### Home > PC3 > Chapter 8 > Lesson 8.3.3 > Problem 8-123

8-123.

Verify the following trigonometric identity: cos(*y*) + sin(*y*) · tan(*y*) = sec(*y*) Homework Help ✎

Rewrite tan(*y*) as sin(*y*) / cos(*y*).

Get common denominators and simplify.

8-123.

Verify the following trigonometric identity: cos(*y*) + sin(*y*) · tan(*y*) = sec(*y*) Homework Help ✎

Rewrite tan(*y*) as sin(*y*) / cos(*y*).

Get common denominators and simplify.