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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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1998
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Q)
$\frac{d}{dx} (\cos x*)$ is equal to :
( A ) $\frac{\pi}{180^{\circ}} \sin x^{\circ}$
( B ) none of these
( C ) $-\frac{\pi}{180^{\circ}} \sin x^{\circ}$
( D ) $-\sin x^{\circ}$
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