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[" 24.If "cos(alpha+beta)sin(gamma+delta...

[" 24.If "cos(alpha+beta)sin(gamma+delta)=cos(alpha-beta)sin(gamma-delta)," then the "],[" value of cot "alpha cot beta cot gamma" ,is "],[[" (a) "cot alpha," (b) "cot beta],[" (c) "cot delta," (d) "cot(alpha+beta+gamma+delta)]]

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