ANTH 2 Chapter 7: Chapter 7 (S&S)
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Let be an acute angle in standard position as shown below inside the circle of radius: p is a point on the terminal side of that is on the circle. Using the pythagorean theorem on the right triangle with side lengths a, b and c, Note: c is the hypotenuse side, b is the opposite side and a is the adjacent side of the. Using the theorem form section 5. 2 (recall soh cah toa), we can define the six trigonometric functions as: Example: following is a right triangle with ac = 3, bc = 2 and
