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sin 5xsin x is equal to(a) 16 cos4x-12 cos2x+1(b) 16 cos4x+12 cos2x+1(c) 16 cos4x-12 cos2x-1(d) 16 cos4x+12 cos2x-1 |
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Answer» is equal to (a) (b) (c) (d) |
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