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If A, B and C are angles of a triangle, then the determinant ∣∣∣∣−1cos Ccos Bcos C−1cos Acos Bcos A−1∣∣∣∣ is equal to (a) 0 (b) -1 (c) 1 (d) None of these |
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Answer» If A, B and C are angles of a triangle, then the determinant (a) 0 |
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