Question

1+cosx= what identity?

Answer 1

\[1+\cos 2x=2 \cos ^{2}x\]

Answer 2

now instead of x pur x/2 and you will get the identity

Answer 3

well the problem is \[\frac{sinx }{ sinx }+\frac{ sinx }{ 1+cosx }=2cscx\]

Answer 4

you need to prove just??

Answer 5

what us cscx? cosec x?

Answer 6

@kirarittgers

Answer 7

No it means 1/sinx

Answer 8

please post the problem once again

Answer 9

Well I'm on my phone now so i can't do an equation let me write it out then upload the picture