Question

cosx/(1-sinX)

answers:
a. 1-sinx/cosx
b. sinx
c. 1+secx/secx
d. 1+cscx/cscx

Answer 1

here is a clue
\[{\cos x \over 1 - \sin x} * {1 + \sin x \over 1 + \sin x}\]

Answer 2

\[cosx+sinxcosx \div 1+sinx ^{2}\]

is that right?

Answer 3

The denominator should be 1 - sin^2 x

Then you can use an identity

Answer 4

so the answer is sinx right? (: