Question

1- tan2 45°=
------------------------
1+Tan2 45°
A. tan90° B.1 C.sin45° D.0​

Answer 1

1-tan2 45=1-1=0

tan 90

Answer 2

1- tan2 45° = 1- tan90°

$= \infty$

And..

1 + tan2 45° = 1 + tan90°

$= \infty$

So,

$\frac{ \infty }{ \infty } = \infty$

= tan90°

Hope this helps you