_ ,0 ^ , ^3 x ,dx = - Vidyadip

MCQ

$\int_{\,0}^{\,\pi } {{{\cos }^3}x\,dx = } $

A
$ - 1$
✓
$0$
C
$1$
D
$\pi $

✓

Answer

Correct option: B.

$0$

b
(b) $\int_0^\pi {{{\cos }^3}xdx = \int_0^{2.\frac{\pi }{2}} {{{\cos }^3}x\,dx = 0} } $,

$\{\because \,\,{{\cos }^{3}}(\pi -x)=-{{\cos }^{3}}x\}$ .

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