Express the product as a sum and use it to find the exact value of: sin(60) sin(30) Express the product as a sum containing only sines or cosines and use it to find the exact value of: 3cos (45) cos(180) Rewrite the sum as a product and use the results to find the exact value of: sin 195 sin105 Find the exact solutions over the interval 0 x 2. 2 sin(x) -1 = 0 Find the exact solutions on the interval [0, 2.7] for: sin(2x)2sinx = 0