If are two sets. Then,
Step 1: Given sets
Step 2: Formation to find the correct answer
From equation (1)
Take only one side to solve the expression
In the above equation take the cos term at LHS
From equation (2)
Take only one side to solve the expression
In the above equation take the sin term at LHS
Multiply by in numerator and denominator
Step 3: From equations (3) and (4)
therefore
Hence option (D) is the correct answer.