I think it's a or d. Forgive me if I am wrong :(
Step-by-step explanation:

Rewrite csc(x) in terms of sin

Multiply the numerator. Notice that the factors in the numerator are reciprocal so they will factor out to 1.

Notice that cotangent and tan are reciprocal so

Answer:
17= 2/3
13,,,a=> (5x+5) (x+3)
Step-by-step explanation:
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Forgive me if wrong
To subtract? as minus means subract/take away?