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Trigonometry Part 2

28 minutes 30 seconds
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Trigonometry diagram overlayed on a real photo of a bridge with a labeled triangle. Labels include an 85-degree angle and opposite side of 120 feet, with adjacent side and hypotenuse not defined. A written equation reads sine theta equals opposite over hypotenuse. Below that, sine 85 degrees equals 120 feet over hypotenuse. Caption. Is the ratio of the opposite side to the hypotenuse.

Begins with a review of Trigonometry Part 1: similar triangles and corresponding angles, names of the sides of a right triangle, and tangent formulas. Then explains how to find the sine and cosine of an angle. To remember ratios suggests using the acronym "SOHCAHTOA." Tells how to find an unknown angle in right triangles using a mathematics calculator. Gives practice in using trigonometric ratios to solve problems.

Media Details

Runtime: 28 minutes 30 seconds

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Lesson Guide
Man crouches down to hold up a yellow rod in vertical position as a girl crouches a few feet across from him. A triangle overlay is drawn to show the angle of elevation. Next to this, an identical triangle is drawn, this time with a tall metal sculpture in a plaza. Caption. The angle of elevation is the same.
Trigonometry
Episode 1
21 minutes 21 seconds
Grade Level: 10 - 12
Trigonometry diagram overlayed on a real photo of a bridge with a labeled triangle. Labels include an 85-degree angle and opposite side of 120 feet, with adjacent side and hypotenuse not defined. A written equation reads sine theta equals opposite over hypotenuse. Below that, sine 85 degrees equals 120 feet over hypotenuse. Caption. Is the ratio of the opposite side to the hypotenuse.
Trigonometry
Episode 2
28 minutes 30 seconds
Grade Level: 10 - 12
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