Question

prove: 1/ 1-sinx = 1+sinx/cos^2 x

Answer 1

Start from RHS

Replace cos^2 x by 1-sin^2 x

Answer 2

it'll turn to 1+sinx/ 1-sin^2x but I don't know how it'll get to 1/1-sinx because you cant just cross out the sinx

Answer 3

Yeah there you have to apply simply

z^2-b^2=(a+b)(a-b)

Got the idea? ;)

Answer 4

huh?

Answer 5

I mean a^2-b^2=(a+b)(a-b)
1-sin^2x=.........

Answer 6

I dont know what youre trying to say...

Answer 7

1+sin x/cos^2 x=(1+sinx)/(1-sin^2 x)=(1+sin x)/(1-sin x)(1+sin x)

Can you do it now?

Answer 8

ohhhh...i get it now...thanks...

Answer 9

yw :)