Final answer:
The expression (cot θ csc θ)² simplifies to cot² θ csc² θ, which matches option A in the original question.
Step-by-step explanation:
To simplify the expression (cot θ csc θ)² we need to apply the exponent to both trigonometric functions within the parentheses, yielding:
cot² θ csc² θ
This is because when an expression inside parentheses is raised to an exponent, the exponent applies to each term inside. So, the simplified form matches option A: cot² θ csc² θ.