Final answer:
The reference angle of csc θ = √2 is d) π/2.
Step-by-step explanation:
The reference angle of csc θ = √2 can be determined by finding the inverse cosecant of √2. The inverse cosecant function returns the angle whose cosecant is equal to √2. Using a calculator, we find that the inverse cosecant of √2 is approximately 0.9553 radians or 54.7356 degrees. Since the reference angle is always positive and less than 90 degrees, the answer is d) π/2.