Instructions To prove an expression, you pick one side of an expression and use the trigonometric identities to rewrite the other side of the expression until it matches the first. It is often helpful to pick the more complicated side, try to convert to sine or cosine, get common denominators or clear fractions, and then use the trigonometric identities. Explain what you did at each step. I SECQE 13(33) : seem tanw sinm