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Instructional Video6:34
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\n\"Proof:\n\n
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\nKhan Academy\n
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\nProof: Law of Sines, Trig Identities and Examples, Trigonometry\n

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\n\nFor Students\n\n11th - Higher Ed\n
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\nSal proves the Law of Sines in this video by using the SOH-CAH-TOA model and setting up equivalent ratios.\n
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\n\"Law\n\n
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\nWest Contra Costa Unified School District\n
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\nLaw of Sines\n

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\n\nFor Teachers\n\n10th - 12th\n\nStandards\n
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\nOne must obey the sine laws. A lesson plan introduces and derives the Law of Sines for non-right triangles. With examples that use the Law of Sines to determine unknown measures in triangles, the lesson plan checks to see...\n
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Lesson Plan
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\n\"Law\n\n
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\nWest Contra Costa Unified School District\n
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\nLaw of Sines\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nLaws are meant to be broken, right? Learners derive the Law of Sines by dropping a perpendicular from one vertex to its opposite side. Using the Law of Sines, mathematicians solve for various parts of triangles.\n
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Instructional Video5:57
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\n\"What\n\n
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\nCurated OER\n
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\nWhat is the Law of Sines?\n

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\n\nFor Teachers\n\n10th - 11th\n
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\nThe Law of Sines is derived in this video by using formula for the area of a triangle that multiplies _ times two adjacent sides and the sine of their included angle.\n
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Lesson Plan
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\n\"Law\n\n
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\nCurated OER\n
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\nLaw of Sines\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nIn this Law of Sines worksheet, students describe, in their own words, when to use the law of sines. They give an example of a problem using the law of sines. This two-page worksheet contains one problem and a sample answer.\n
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Lesson Plan
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\n\"The\n\n
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\nCurated OER\n
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\nThe Law of Sines and the Law of Cosines\n

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\n\nFor Teachers\n\nHigher Ed\n
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\nIn this college level trigonometry worksheet, students apply the Law of Sines and the Law of Cosines to solve triangles. The four page worksheet contains forty-four problems. Solutions are not provided. \n
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Lesson Plan
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\n\"Applying\n\n
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\nEngageNY\n
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\nApplying the Laws of Sines and Cosines\n

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\n\nFor Students\n\n9th - 10th\n\nStandards\n
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\nBreaking the law in math doesn't get you jail time, but it does get you a wrong answer! After developing the Law of Sines and Cosines in activity 33 of 36, the resource asks learners to apply the laws to different situations. Pupils must...\n
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\n\"Putting\n\n
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\nEngageNY\n
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\nPutting the Law of Cosines and the Law of Sines to Use\n

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\n\nFor Teachers\n\n11th - 12th\n\nStandards\n
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\nUse the Law of Cosines and the Law of Sines to solve problems using the sums of vectors. Pupils work on several different types of real-world problems that can be modeled using triangles with three known measurements. In the process,...\n
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Lesson Plan
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\n\"Law\n\n
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\nEngageNY\n
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\nLaw of Sines\n

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\n\nFor Teachers\n\n11th - 12th\n\nStandards\n
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\nProve the Law of Sines two ways. The ninth segment in a series of 16 introduces the Law of Sines to help the class find lengths of sides in oblique triangles. Pupils develop a proof of the Law of Sines by drawing an altitude and a second...\n
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Lesson Plan
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\n\"Introduction\n\n
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\nCurated OER\n
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\nIntroduction to Law of Sines\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nStudents solve problems using the law of sines.  In this sines lesson, students work in groups and individually to solve problems using the law of sines.  They identify real life problems that require the use of the law of...\n
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\n\"Algebra\n\n
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\nCurated OER\n
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\nAlgebra 2 & Trigonometry Practice: Law of Sines\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nFor this law of sines worksheet, students solve 9 multiple choice and short answer problems.  Students use the law of sines to missing side lengths and angles of triangles.\n
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Worksheet
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\n\"Law\n\n
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\nCurated OER\n
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\nLaw of Sines\n

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\n\nFor Students\n\n10th\n
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\nIn this Law of sines instructional activity, 10th graders solve 10 different sets of problems related to the Law of Sine and Ambiguous case. First, they determine the ratio of the sides of the triangle with the given measurements. Then,...\n
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Interactive
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\n\"Angle-Side-Angle\n\n
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\nCK-12 Foundation\n
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\nAngle-Side-Angle Triangles: Caution Tape\n

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\n\nFor Students\n\n10th - 12th\n\nStandards\n
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\nDon't lose your marbles. Scholars use an interactive to create a triangle that closes off a portion of a sidewalk with loose marbles. The Law of Sines helps them find the side measures of such a triangle.\n
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Lesson Plan
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\n\"Triangle\n\n
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\nAlabama Learning Exchange\n
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\nTriangle Area: No Height? Use the Sine\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nNo height? No problem! Learners use their knowledge and a little help from GeoGebra to develop the Law of Sines formula. The Law of Sines helps to determine the height of triangles to calculate the area.\n
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Lesson Plan
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\n\"Using\n\n
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\nEngageNY\n
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\nUsing Trigonometry to Find Side Lengths of an Acute Triangle\n

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\n\nFor Students\n\n9th - 10th\n\nStandards\n
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\nNot all triangles are right! Pupils learn to tackle non-right triangles using the Law of Sines and Law of Cosines. After using the two laws, they then apply them to word problems. \n
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Lesson Plan
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\n\"Law\n\n
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\nCurated OER\n
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\nLaw of Sines Word Problems\n

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\n\nFor Teachers\n\n11th - 12th\n
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\nYoung scholars solve word problems using the law of sines. In this precalculus lesson, students work in groups as they define vocabulary terms. They apply the formula of sine to answer and solve problems.\n
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Lesson Plan
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\n\"Law\n\n
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\nCurated OER\n
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\nLaw of Sines\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nYoung scholars identify the ratios of a right triangle. In this calculus lesson, students use the law of sines to solve problems involving non-right triangles. They identify the different parts of a triangle.\n
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Lesson Plan
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\n\"Algebra\n\n
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\nCurated OER\n
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\nAlgebra And Trigonometry - Week 3: Law of Sines\n

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\n\nFor Teachers\n\n12th - Higher Ed\n
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\nIn this law of sines worksheet, young scholars read story problems. They use both algebra and the law of sines and cosines to solve problems. This two page worksheet contains seven problems.\n
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Worksheet
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\n\"Law\n\n
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\nCurated OER\n
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\nLaw of Sines and Law of Cosines\n

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\n\nFor Students\n\n11th - 12th\n
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\nIn this Pre-calculus/Trigonometry worksheet, students use the laws of sines and cosines to solve triangles. The four page worksheet contains thirteen problems. Answers are not included.\n
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Interactive
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\n\"Ten\n\n
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\nTen Law of Sines Problems\n

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\n\nFor Students\n\n8th - 10th\n
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\nIn this law of sines worksheet, students use the law of sines to solve for the missing side or angle in ten problems.  A diagram is provided.\n
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Instructional Video2:52
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\n\"Sine\n\n
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\nSine or Cosine Rule?\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nExplore triangle problems that require the Law of Sine or Law of Cosine. A straightforward lesson focuses on deciding when to use each law. The instructor presents several triangles for pupils to consider and describes patterns in the...\n
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Lesson Plan
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\nThe Laws of Sines and Cosines Made Simple!\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nStudents study the law of sine and cosine. For this pre-calculus lesson, students create a triangle and identify the different ratios of a non-right triangle. They use the properties of sine and cosine to solve.\n
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Interactive
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\n\"Law\n\n
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\nLaw of Sines or Sine Rule\n

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\n\nFor Students\n\n9th - 12th\n
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\nIn this online math worksheet, students construct triangles and squares by utilizing the sine rule. This excellent resource allows the students to check their answers, and to get \"hints\" should they run into difficulties. A terrific...\n
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\n\"Law\n\n
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\nCurated OER\n
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\nLaw of Sines\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nStudents solve problems using sine and cosine. In this precalculus lesson, students ask questions about the Law of sines and its application to the real world. They derive the correct formula of sine for each problem.\n
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