1.

What is `int (d theta)/(sin^(2) theta + 2 cos^(2) theta -1)` equal to ?A. `tan theta + c`B. `cot theta + c`C. `(1)/(2) tan theta + c`D. `(1)/(2) cot theta + c`

Answer» Correct Answer - A
Let `I = int (d theta)/(sin^(2) theta + 2 cos^(2) theta - 1)`
`= int (d theta)/(1- cos^(2) theta + 2 cos^(2) theta - 1) = int (d theta)/(cos^(2) theta)`
`= int sec^(2) theta d theta = tan theta + c`


Discussion

No Comment Found

Related InterviewSolutions