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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2001
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Q)
If $ A, B, C, D$ are angles of a cyclic quadrilateral, then $\cos A + \cos B + \cos C + \cos D$ is equal to :
( A ) $4$
( B ) $-1$
( C ) $1$
( D ) $0$
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