Question

Simplify.

csc^2θ + cot^2θ - 1



0

2

cot^2θ

2cot^2θ

Answer 1

\[
\cot ^2(\theta )+\csc ^2(\theta )-1= cot ^2(\theta )+ cot ^2(\theta )+1 -1\\



\]

Answer 2

It is the last choice

Answer 3

$$
\cot^2\theta= \csc^2θ -1\\
$$
So
$$
\csc^2θ + \cot^2θ - 1\\
=\cot^2\theta+cot^2\theta\\
=2\cot^2\theta
$$