AP EAMCET202120 Aug 2021Morning ShiftMathematicsIndefinite IntegrationActual
If ∫ 0 a d x 4 + x 2 = π 8 , then the value of a =
Options
- A1
- B2
- C3
- D4
Correct answer
B. 2
Step-by-step solution
∫ 0 a d x 4 + x 2 = π 8 ∫ 0 a d x 2 2 + x 2 = π 8 Use, ∫ d x a 2 + x 2 = 1 a tan - 1 x a + c ⇒ 1 2 tan - 1 a 2 = π 8 ⇒ tan - 1 a 2 = π 4 ⇒ a 2 = tan π 4 ⇒ a 2 = 1 ⇒ a = 2