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- Grade Range
- 9th
- Rating
Students explain the meaning of sine, cosine, and tangent ratios in right triangles. They demonstrate the use of trigonometric ratios in solving right triangles and calculate an unknown side or an unknown angle in a right triangle. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students review Order of Operations. They use Side-Angle-Side theorem to solve for missing information. Students use the law of cosines to find missing measurements. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students explore how trigonometry is related to triangles. They examine the use of trigonometric functions for sine, cosine, and tangent. Students identify and use formulas for the law of sines and cosines. Full Review »
- Grade Range
- 10th - 11th
- Rating
Students calculate the unknown sides and angles of a triangle and explore why one cannot determine the lengths of the sides of triangles if only the angles are known. Students explore the Law of Sines and the Law of Cosines by creating and measuring triangles. Students calculate the unknown sides by applying the correct formula. Full Review »
- Grade Range
- 6th - 8th
- Rating
Students determine the level of accuracy needed for computations involving measurements and irrational numbers. They use the correct number of digits in computation to achieve an appropriate unit or level of accuracy when solving problems. Pupils solve problems using the Law of Sines and Law of Cosines. Full Review »
- Grade Range
- 11th
- Rating
Students complete worksheet relating to right and equilateral triangles, discuss definition of trigonometric functions and locate functions on scientific calculator, and solve problems using sines and cosines. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students study the retreat of the Nez Perce Native Americans into Montana while tracing their journey on a map. They use the law of cosines to solve problems based on the navigational methods of the Nez Perce. They work with both the law of cosines and the law of sines using a software program. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students solve equations using TI-83 graphing calculator. They explore daylight hours for various locations around the world, record hours of daylight for twelve different times during year, and fit data points to cosine curve. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students record the horizontal position versus time for a swinging pendulum. They also determine the period of the pendulum motion and model the position data using a cosine function. Finally, students use a Motion Detector to plot the position versus time graph for a simple pendulum and the data to model the motion with the cosine function y = Acos(B(x - C)) + D to mimic the position versus time graph. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students link the use of trigonometric ratios to the use of trigonometric functions. Students contribute sets of data points to build the graphs of the sine and cosine functions. Worksheet and activity is included with this lesson. Full Review »
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