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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class12  >>  Integral Calculus
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Q)

$f'(x) = a cos x + b \sin x ; f'(0)=4; f(0)=3; f \bigg(\large\frac{\pi}{2}\bigg)$$=5$ find the value of $f(x)=$?

$(a)\;4 \tan x + 2 \cot x +1\qquad(b)\;4 \sin x + 2 \cos x +1\qquad(c)\;4 \cos x + 2 \sin x +1\qquad (d)\;\cos x + \sin x$

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