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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` |
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