Question

Pleaseeee! I need help evaluating this:Tan 2 theta-(1-tan^ 2 )=?​

Answer 1

Answer:

$\tan \left(2\theta\right)-1+\tan ^2\left(\theta\right)$

Key:

• $-\left(a-b\right)=-a+b$

Step-by-step explanation:

$\tan \left(2\theta\right)-\left(1-\tan ^2\left(\theta\right)\right)$

$-\left(1-\tan ^2\left(\theta\right)\right)=-1+\tan ^2\left(\theta\right)$

$=\tan \left(2\theta\right)-1+\tan ^2\left(\theta\right)$