Question

Prove: sin θ - sin θ•cos2 θ = sin3 θ.

Answer 1

use the identity :
cos^2 θ = 1 - sin^2 θ

Answer 2

got it ?

Answer 3

no;/

Answer 4

lol.... why no??

Answer 5

ok, factor sin out, what do you get?

Answer 6

i dont know how D: i had to skip that part of the lesson to get these assignments done. i was just trying to find someone to explain how to do this