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Mathematics
Mathematics
Problem
Evaluate
∫
0
π
/
4
(
1
+
tan
2
x
)
d
x
\displaystyle \int_{0}^{\pi/4}\bigl(1+\tan^{2}x\bigr)\,dx
∫
0
π
/4
(
1
+
tan
2
x
)
d
x
. a)
2
−
1
\sqrt{2}-1
2
−
1
b) 1 c)
2
\sqrt{2}
2
d)
π
4
+
1
\dfrac{\pi}{4}+1
4
π
+
1
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