Power reducing formulas cos 2x 1+ cos 2x sin? x = cos? x = Pythagorean Identities sin² 0 + cos? 0 = 1 1 + tan? 0 = sec? 0 1+ cot? 0 = csc² 0 1. Rewrite the expression sin* 70 entirely in terms of cosine. Simplify as much as possible. cos? x 2. Rewrite and simplify the expression Vsin x entirely in terms of sine. 3. Rewrite the expression tan (2x) sec²(2x) entirely in terms of tangent.

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