### Home > PC > Chapter 6 > Lesson 6.4.2 > Problem 6-155

6-155.

Prove each trigonometric identity.

1. Change all terms to sines and cosines.

2. Get common denominators.

3. Use the Fundamental Pythogorean Identies.

= 2 csc *x*

6-155.

Prove each trigonometric identity.

1. Change all terms to sines and cosines.

2. Get common denominators.

3. Use the Fundamental Pythogorean Identies.

= 2 csc *x*