AP EAMCET202023 Sep 2020Morning ShiftMathematicsDefinite IntegrationActual
If the value of ∫ 0 π / 2 sin 4 x · cos 2 x d x = π 32 then the value of ∫ 0 π / 2 cos 4 x · sin 2 x d x =
Options
- Aπ 32
- Bπ 64
- Cπ 4
- Dπ 8
Correct answer
A. π 32
Step-by-step solution
Given, ∫ 0 π 2 sin 4 x · cos 2 x d x = π 32 ⇒ ∫ 0 π 2 sin 4 π 2 - x · cos 2 π 2 - x d x = π 32 ∵ ∫ a b f x d x = ∫ a b f a + b - x d x ⇒ ∫ 0 π 2 cos 4 x · sin 2 x d x = π 32