Question

Express `(1-sin^2x)/cosx` in terms of sine ratio of `x` and / or its multiples?

Answer 1

Please see below.

Explanation:

`(1 - sin^2 x)/(cosx)`

= `cos^2x/cosx`

= `cosx`

= `(2sinxcosx)/(2sinx)`

= `(sin2x)/(2sinx)`