Question

sinx-sinx cos^2x

Answer 1

@iambatman

Answer 2

@chosenmatt @jdoe0001

Answer 3

please help anyone!

Answer 4

what help do you want with this?

Answer 5

Please help me solve it, I'm having troubles with it.

Answer 6

ok thats what i thought

Answer 7

sinx - sinx cos2x = sin3x

remember that sin2x + cos2x = 1, so cos2x = 1 - sin2x, and we can substitute that in place of cos2x...

sinx - sinx (1 - sin2x) = sin3x now distribute the sinx into the parentheses...

sinx - (sinx - sin3x) = sin3x

sinx - sinx + sin3x = sin3x

sin3x = sin3x

Answer 8

This really helped, but i have one question. Why did you equal it to sin3x at the beginning?

Answer 9

@Okean

Answer 10

because sinx-sinxcos^2x=sinx so so its sin3x

Answer 11

OHHHH ok thank you so much!!