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Use a change of variables to evaluate the definite integral 7r 4 f0 / sec2 (9t) tan(9t)dt Enter an exact answer. 1r/ 4 2 d
Use a change of variables to evaluate the definite integral 7r 4 f0 / sec2 (9t) tan(9t)dt Enter an exact answer. 1r/ 4 2 d A; sec (9t) tan(9t) t @a |_
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