Question

solve for x cos^2x-sin^2x=sin x

Answer 1

\[\cos^2x-\sin^2x =sinx\]

Answer 2

I see trig... I see trig stuff squared... im thinkin trig identities right off the bat!

Answer 3

cox 2x comes to mind...

Answer 4

but it's useless, I think?

Answer 5

no i like the thinking!

Answer 6

LOL, this is a quadratic equation in disguise

Answer 7

cos^2 x = 1 - sin^2 x right?
so we can turn it into...
1 - sin^2 x - sin^2 x = sin x

Answer 8

\[\cos^2x-\sin^2=1-2\sin^2x\]

Answer 9

oops :P
ditto

Answer 10

Oh, you can do it from here? great :)

Answer 11

I'm not the asker
@ksaimouli can you take it from here?

Answer 12

derp, I forgot about that (sorry)