Question Detail
Question
By Wallis' formula, evaluate ∫₀^(π/2) sin⁵x dx
Correct Answer
Option C is the correct answer.
Detailed Explanation
By Wallis' formula for an odd power n=5: (4/5)(2/3)(1)=8/15.
Hint
Use Wallis' formula for an odd power of sine alone: multiply down (n-1)/n, (n-3)/(n-2), ... to 1.