Simplify the trigonometric expression cos3x sin2x cosx Simp

Simplify the trigonometric expression. cos^3(x) + sin^2(x) cos(x) Simplify the trigonometric expression. 4 + 2 cos(y)/2 + 4 sec(y) cos (y)

Solution

7) cos³x + sin²x * cos x

[ from sin²x + cos²x = 1, sin²x = 1- cos² x]

cos³x + ( 1- cos²x) *cos x

cos³x + cos x - cos³x

= cos x