(a) Let's verify the identity

How can we use trig identities to rewrite our last equation?

** A. ** ** B. ** ** C. ** ** D. ** ** E. ** ** F. ** ** G. ** None of the above

How can we simplify the previous equation?

** A. ** ** B. ** ** C. ** ** D. ** ** E. ** ** F. ** ** G. ** None of the above

How can we finish the proof?

** A. ** After simplifying further, we obtain the half angle formulas for sine and cosine.** B. ** After simplifying further, we obtain the double angle formulas for sine and cosine.** C. ** After simplifying further, we obtain the Pythagorean Identity.** D. ** After simplifying further, we obtain the double angle formulas for sine.** E. ** After simplifying further, we obtain the half angle formulas for cosine.** F. ** After simplifying further, we obtain the half angle formulas for sine.** G. ** After simplifying further, both sides become equal.** H. ** After simplifying further, we obtain the double angle formulas for cosine.** I. ** None of the above

(b)
Evaluate tan(

** A. ** ** B. ** ** C. ** ** D. ** ** E. ** ** F. ** ** G. ** ** H. ** ** I. ** None of the above