- #1

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## Homework Statement

k=[tex]\frac{1+sinx}{cosx}[/tex]

prove that [tex]\frac{1}{k}[/tex]=[tex]\frac{1-sinx}{cosx}[/tex]

thanks in advance

## Homework Equations

## The Attempt at a Solution

## Homework Statement

## Homework Equations

## The Attempt at a Solution

i tried substitution of 1 with

cos^2(x)+sin^2(x) and

cosec^2(x)-cot^2(x) and

sec^2(x)-tan^2(x)

but im stucked agn..