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Instructional Video3:05
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\n\"Introduction\n\n
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\nFuseSchool\n
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\nIntroduction to SOHCAHTOA\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nExplore right triangle trigonometry with a thorough video lesson. The lesson instructor introduces the trigonometric ratios with an examination of right triangle sides and angles. She continues with practice writing the ratios using...\n
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Performance
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\n\"Georgia\n\n
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\nRadford University\n
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\nGeorgia Peaches and California Dreamin’\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nPlant the fruits of trigonometry. Pairs work through the process of finding the best place to plant fruit trees on a piece of property. The scholars must take into consideration the location of the property and the solar zenith angle. To...\n
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Interactive
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\n\"Pythagorean\n\n
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\nCK-12 Foundation\n
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\nPythagorean Theorem for Solving Right Triangles: Solving the Triangle\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nObserve the change in the trigonometric ratios as angles vary. An interactive provides the values of trigonometric ratios for both acute angles in a right triangle. Pupils create a right triangle to match given criteria and find the...\n
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Instructional Video4:39
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\n\"Sine\n\n
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\nFuseSchool\n
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\nSine Rule\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nDiscover how to apply the Law of Sines to find unknown side and angle measures. A detailed video lesson describes the Law of Sines in different forms. The instructor completes two different examples that find both an angle and side...\n
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Instructional Video20:08
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\n\"Trig\n\n
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\nFlipped Math\n
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\nTrig Ratios\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nTake ratios of sides to a new level. Pupils learn the definitions of the three basic trigonometric ratios in right triangles. Using the definitions, scholars find missing lengths in right triangles, based on a known angle. Individuals...\n
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Worksheet
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\n\"8-5\n\n
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\nCurated OER\n
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\n8-5 Reteaching Worksheet. Using Trigonometry\n

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\n\nFor Students\n\n11th - 12th\n
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\nFor this using trigonometry worksheet, students solve story problems based on finding the angle of elevation and angle of depression. This two-page worksheet contains ten trigonometry angle problems.\n
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Lesson Plan
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\n\"Trigonometry\n\n
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\nCurated OER\n
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\nTrigonometry Involving Figures - Week 11\n

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\n\nFor Teachers\n\n10th - 11th\n
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\nIn this trigonometry worksheet, learners use trigonometric functions to determine the measurement of angles and the length of sides in given figures. Most figures are comprised of rectangles containing parallel and perpendicular lines,...\n
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Instructional Video4:29
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\n\"How\n\n
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\nCurated OER\n
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\nHow Do You Find a Missing Side of a Right Triangle Using Sine?\n

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\n\nFor Teachers\n\n6th - 11th\n
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\nWhat's a trigonometric ratio? It is a ratio between two sides of a right triangle. In this problem, find sin(A) in the given right triangle. Use the ratio of the opposite side divided by the hypotenuse to find sin(A). The instructor...\n
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Lesson Plan
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\n\"Special\n\n
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\nCurated OER\n
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\nSpecial Right Triangles\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nIn this special right triangle worksheet, students use the trigonometric functions to determine angle measurement or the length of one side of a right triangle. This one-page worksheet contains 18 problems. Answers are provided at the...\n
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Worksheet
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\n\"Inverse\n\n
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\nCurated OER\n
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\nInverse Trig Functions\n

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\n\nFor Students\n\n10th - 11th\n
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\nLearners solve and graph 10 different problems that are the inverses of various trig functions. First, they determine which equation is equivalent to a given equation. Then, they find an angle of a right triangle, given its leg lengths....\n
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Lesson Plan
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\n\"Unit\n\n
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\nCurated OER\n
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\nUnit Circle\n

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\n\nFor Teachers\n\n11th - 12th\n
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\nIn this Pre-Calculus worksheet, students solve problems involving angles and the unit circle.  The four page worksheet contains a combination of twenty multiple choice and free response problems.  Answers are provided. \n
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Instructional Video9:57
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\n\"Trig\n\n
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\nKhan Academy\n
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\nTrig Identities Part 2 (Part 4 If You Watch the Proofs)\n

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\n\nFor Students\n\n10th - 12th\n
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\nIn this video, Sal reviews the basic trigonometric definitions and identities, including the sum of angle formulas, and then derives the double angle formulas.\n
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Instructional Video9:22
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\n\"Proof:\n\n
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\nKhan Academy\n
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\nProof: cos(a+b)=(cos a)(cos b)-(sin a)(sin b)\n

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\n\nFor Students\n\n10th - 12th\n
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\nUsing a similar method that he used to prove the sum of angles formula for sine, Sal shows the proof of the cosine sum of angles formula, cos (a+ b) = cos (a) cos (b) - sin (a) sin (b). This proof also uses the SOH-CAH-TOA model and some...\n
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Instructional Video9:49
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\n\"Proof:\n\n
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\nKhan Academy\n
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\nProof: sin(a+b)=(cos a)(sin b)+(sin a)(cos b)\n

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\n\nFor Students\n\n10th - 12th\n
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\nSal proves the sum of angles formula for sine, sin (a+ b) = cos (a) sin (b) + sin (a) cos (b), through a clear but rather non-intuitive proof. The proof is interesting as it uses the SOH-CAH-TOA model and requires one to recall some...\n
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Worksheet
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\n\"Math\n\n
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\nCurated OER\n
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\nMath Honors 2: Trigonometry Review Questions\n

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\n\nFor Students\n\n11th - 12th\n
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\nIn this Algebra II/Trigonometry worksheet, students solve problems involving angle of depression or elevation, evaluate trigonometric expressions, solve trigonometric equations, and graph trigonometric functions. The one page worksheet...\n
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Worksheet
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\n\"Angle\n\n
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\nCurated OER\n
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\nAngle Sum and Difference\n

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\n\nFor Students\n\n11th\n
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\nIn this angle sum and difference worksheet, 11th graders solve 10 different problems related to determining the angle sum and difference of numbers. First, they determine the exact value of sine and cosine degrees. Then, students utilize...\n
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Worksheet
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\n\"Using\n\n
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\nCurated OER\n
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\nUsing Trinonometry to Find Angle Measures\n

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\n\nFor Students\n\n10th - 12th\n
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\nIn this trigonometric ratios worksheet, students find the missing angle of 20 triangles by using sine, cosine and tangent ratios. Students compute the angle measurement of given ratios for six problems.\n
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Worksheet
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\n\"Similar\n\n
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\nCurated OER\n
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\nSimilar Polygons\n

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\n\nFor Students\n\n10th\n
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\nFor this similar polygons worksheet, 10th graders solve 10 different problems that include determining various similar polygons. First, they determine the perimeter of a second triangle given the measures of all angles in the first....\n
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Worksheet
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\n\"Missing\n\n
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\nCurated OER\n
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\nMissing Angles\n

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\n\nFor Students\n\n10th - 11th\n
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\nIn this missing angle worksheet, students use trigonometry ratios to determine the measurement of a missing angle. Students identify sine, cosine and tangent ratios. This one-page worksheet contains ten problems.\n
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\n\"Trigonometry\n\n
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\nCurated OER\n
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\nTrigonometry Practice: Trigonometric Graphs #3\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nIn this Trigonometry Practice worksheet, young scholars are asked to graph a variety of trigonometric functions.  A graphing calculator is required to complete these three pages.\n
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Worksheet
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\n\"Triangle\n\n
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\nCurated OER\n
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\nTriangle and Circle Trigonometry\n

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\n\nFor Students\n\n11th - 12th\n
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\nIn this Pre-calculus/Trigonometry worksheet, students apply advanced triangle and circle trigonometry to solve application problems. The three page worksheet contains sixteen problems. Answers are not included.\n
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Lesson Plan
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\n\"Trigonometry\n\n
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\nCurated OER\n
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\nTrigonometry - Week 9\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nIn this trigonometry worksheet, students use the sum-to-product formula, and the law of sines and cosines to solve trigonometry problems. This two-page worksheet contains eight problems.\n
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Organizer
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\n\"Year\n\n
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\nCurated OER\n
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\nYear 10 Trigonometry Ch. 14 Answer Sheet\n

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\n\nFor Students\n\n11th - Higher Ed\n
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\nIn this math worksheet, students find the solutions for the trigonometry problems. They label the hypotenuse, adjacent, and opposite sides. The calculations are done using sine, cosine, and tangent.\n
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Worksheet
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\n\"Easy\n\n
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\nCurated OER\n
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\nEasy Worksheet: Trigonometry\n

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\n\nFor Students\n\n9th - 12th\n
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\nIn this trigonometry worksheet, students solve 4 short answer problems. Students find the secant, cosine, or tangent of the given angle shown in the diagram.\n
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\n\nGet Free Access\n\nSee Review\n
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