Use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine, as in Example 4. cos4(x) sin4(x)

Answer 1

Is that a) cos(4x) or b) (cos(x))⁴ ? Either way, the simplification runs to going to greater multiples of x:

a) .(1/2)sin(8x) and b) (1/16)sin⁴(2x)