We reviewed for the final by mostly going over problems with trig functions.

SOHCAHTOA

CHOSHACAO

Understanding the reciprocal relationships was useful for a few problems.

Sometimes the double angle and half angle formulas were used.

Rewriting the functions in terms of sinx and cosx can be useful. As is knowing that sin^2x + cos^2x = 1 .

It would be helpful to memorize that

sin(0°) = 0

sin(90°) = 1

cos(0°) = 1

cos(90°) = 0

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