Use the accompanying figure to explain why the following
Chapter 7, Problem 57(choose chapter or problem)
Use the accompanying figure to explain why the following four identities are valid. (The identities can be used to provide an algebraic foundation for the reference-angle technique that weve used to evaluate the trigonometric functions.)(i) sin(t p) sin t (iii) cos(t p) cos t(ii) sin(t p) sin t (iv) cos(t p) cos t
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