- #1

sapiental

- 118

- 0

I tried using the half angle formula but this gives me a much more difficult integral, so i resorted to just regular substitution but am not sure if I can do this.

u = cos(x)

du = -sin(x)dx

indefinite integral -u^4du

then -1/5(u)^5 + C or -1/5(cos^5) + C

thanks!