Question
$\int_{ - a}^a {\sin x\,f(\cos x)\,dx = } $
$f(x) = \sin x\,f(\cos x) \Rightarrow f( - x) = - \sin x\,f(\cos x)$
$\because$ $f(x)$ विषम फलन है
$\therefore \,\,\,I = \int_{}^{} {f(x)dx = 0} $.
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