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The value of int0^(pi/2) (dx)/(1+tan^3 x...

The value of `int_0^(pi/2) (dx)/(1+tan^3 x)` is (a) `0` (b) `1` (c) `pi/2` (d) `pi`

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CENGAGE ENGLISH-INTEGRALS-All Questions
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  14. Let f be a real valued function satisfying f(x)+f(x+r)=f(x+2)+f(x+6) ...

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