Help me find the missing factor to rewrite the expression with a monomial denominator.?

Question

(1 / csc x - cos x)( )

a. (csc x - cot x) / (csc x - cot x)
b. (csc x + cot x) / (csc x + cot x)
c. sin x + tan x
d. (1/ sin x) - (1/ tan x)
e. none of these

Answer 1

e