Answer:
Option d.

Explanation:
The complete question is
Given (1+cosx)/(sinx) + (sinx)/(1+cosx) =4, find a numerical value of one trigonometric function of x.
a. tanx=2
b. sinx=2
c. tanx=1/2
d. sinx=1/2
we have

Find the common denominator and adds the fractions

Expanded the numerator

Remember that
----> trigonometric identity
substitute


Factor 2 in the numerator

Simplify

