NTA Abhyas JEE Main2020MathematicsArea Under CurvesPractice
The area (in sq. units) bounded by y = max sin 2 x , sin 4 x , x ∈ 0 , π 2 with the x -axis, from x = 0 to x = π 2 is
Options
- Aπ
- Bπ 2
- Cπ 4
- Dπ 6
Correct answer
C. π 4
Step-by-step solution
As x ∈ 0, π 2 , sin x ∈ 0 , 1 ⇒ sin 2 x > sin 4 x So, the required area is A = ∫ 0 π 2 sin 2 x d x = ∫ 0 π 2 1 - cos 2 x 2 d x = x 2 - sin 2 x 4 0 π 2 = π 4 - 0 - 0 - 0 = π 4 sq. units