Question

Rewrite as an expression that does not involve a fraction.

Answer 1

The pythagorean formula tells us that

`\sin ^2x+\cos ^2x=1`

Then,

`\sin ^2x=1-\cos ^2x`

Replacing this in the numerator, we obtain

`(\sin ^2x)/(1-\cos ^2x)=(1-\cos ^2x)/(1-\cos ^2x)=1`

Then, the expression is equal to 1.