Verify the identity pre calculus

The verification is in the explanation.

Step-by-step explanation:

I'm going to start with the left and play with it til I get the right.

First step: Expand the binomial square using .

Second step: Realize and are reciprocal functions. Their product will be 1.

[Side note: .]

Third step: Recall the Pythagorean Identities and :

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.