Any teacher give me the answer

Step-by-step explanation:

Identities needed:

Convert into one fraction, using our third identity.

Multiply the right hand term by so we can simplify.

Now, let's write our tans in terms of sin and cos, using our second identity.

And simplify using division rules, and then simplify by expanding the numerator:

Now we can substitute cos for sin, using our first identity.

Lets divide by

And convert it back into one fraction:

Expand the binomial: