1.2. Prove the following the trigonometric identity step-by-step
1.2.1 sin theta/sin theta+cos theta=tan theta/1+tan theta

The identity is proved below.

Step-by-step explanation:

The tangent of an angle is given by:

In this question, we are given the following trigonometric identity:

Applying the tangent

Now, we apply the least common multiple on the denominator. So

SImplifying the cosine:

Which means that the identity is proved.