Question

Rewrite with only sinx and cosx.
cos2x-sinx

Answer 1

are you familiar with double angle formulae ?

Answer 2

yes. I know that cos2x would be cos^2x-sin^2x

Answer 3

I think thats what you have to substitute only.

Answer 4

Just substitute and you are done :)

Answer 5

so would it be cos^2x-sin^2-sinx?

Answer 6

yep

Answer 7

according to me yes
infact there can be more than 1 answers to it

Answer 8

would it be possible for it to be cos^2x-sin^3x?

Answer 9

nope?

Answer 10

ok. thanks!

Answer 11

yw :)