Question: O. Let (a) How does cos(C) relate to cos(B)? How does sin(C) relate to sin (B)? (b) Using your answer to 2f) write the formula

 O. Let (a) How does cos(C) relate to cos(B)? How does

O. Let (a) How does cos(C) relate to cos(B)? How does sin(C) relate to sin (B)? (b) Using your answer to 2f) write the formula for cos( A - C'). (c) In 3b) replace C' with -B. (d) Using 3a), simplify the equation in 3c). Your result should be a formula for cos(A + B)

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