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If A + B + C = π, then sec A (cos B cos C − sin B sin C) is equal to(a) 0(b) −1(c) 1(d) None of these |
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Answer» If A + B + C = π, then sec A (cos B cos C − sin B sin C) is equal to (a) 0 (b) −1 (c) 1 (d) None of these |
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