1. Trigonometric Functions:
Section 6.2
Trigonometric Functions:
Unit Circle Approach

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21. Make a second congruent triangle.
This triangle is equilateral so all sides are 1. 2a = 1 so a = .
Use Pythagorean Theorem to find b.

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36. Your calculator has buttons for sin, cos, and tan so to find values of the remaining 3 trigonometric functions we use:

37. CHANGE MODE TO RADIANS