Write the left side of the identity in terms of sine and cosine. Rewrite the numerator and denominator separately. ​(Do not​ simplify.) Simplify the fraction from the previous step such that both the fractions have the common denominator The expression from the previous step then simplifies to using​ what? A. Addition and a Reciprocal Identity B. Addition and a Pythagorean Identity

(c) Addition and Quotient identity

Step-by-step explanation:

Given

--- The expression missing from the question

Solving (a): Write the left hand side in terms of sin and cosine

In trigonometry:

and

So, the expression becomes:

Rewrite as:

Solving (b): Simplify

Change / to *

Solving (c): The property used

To do this, we need to further simplify

Take LCM

Add the numerator

Apply quotient identity

This gives

Hence, the properties applied are:

Addition and Quotient identity

1) is right

step-by-step explanation: