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Please show all work and be sure all fractions and radicals are in simplest form. WRITE THE FORMULA for each, show the substitutions, show any rewrite using reference angles (and sign adjustments) if appropriate, then state the exact value for the answer. 1. Find the exact value of cos2A, given cosA = . (3 points) 2. Find the exact value of sin2A given sinA = = and A is obtuse. (4 points) 3. Find the exact value of cos2A given angle A terminates in Quadrant II and sinA = 11/12. (3 points) 4. Find the exact value of tan2A if, angle A is acute, sinA = and cosA = (4 points)