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Mathematics
Mathematics
Problem
For
∫
0
π
/
4
tan
(
3
θ
)
sec
2
(
3
θ
)
d
θ
\displaystyle \int_{0}^{\pi/4} \tan(3\theta)\sec^{2}(3\theta)\,d\theta
∫
0
π
/4
tan
(
3
θ
)
sec
2
(
3
θ
)
d
θ
, indicate a substitution
u
u
u
and give the corresponding new limits of integration.
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