### Home > CALC > Chapter 4 > Lesson 4.5.1 > Problem 4-164

4-164.

Double Angle identity (factor first).

Factor first.

Sum and Difference (Angle Sum) identity.

Start by rewriting tan(*x*) and cot(*x*) as fractions.

You will use more than one identity.

4-164.

Double Angle identity (factor first).

Factor first.

Sum and Difference (Angle Sum) identity.

Start by rewriting tan(*x*) and cot(*x*) as fractions.

You will use more than one identity.