Question

Rewrite with only sin x and cos x

sin 3x - cos x

Pwease help me

Answer 1

sin 3x = sin(2x+x) = sin2x cosx +cos2x sinx
now sin2x = 2sinx cosx
cos2x = cos^2x -sin^2x
can you do it now??

Answer 2

ummm I'm a little confused still :(

Answer 3

where??

Answer 4

wait would the answer be 2 sin^3 x cos^4 x +1

Answer 5

i dont know the answer its lengthy question but the clue is right i just gave you