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Third Nine Weeks Exam Study Guide

Note 1

Verify a point on the unit circle

A^2 + B^2 = 1

Is (3/5,-4/5) on the unit circle?
(3/5)^2 + (-4/5)^2 = 1
9/25 + 16/25 = 1
25/25 = 1
Yes, this point is on the unit circle

Note 2

Evaluate exact trig functions

Explanation: sin=y csc=1/y
cos=x sec=1/x
tan=y/x cot=x/y

1) sin(pi/4)= √2/2
2) cos(pi/2)=0

Note 3

Graph sin, cosine, etc

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