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Statement-1: cos((pi)/(10))cos((2pi)/(10...

Statement-1: `cos((pi)/(10))cos((2pi)/(10))cos((4pi)/(10))=(cos((8pi)/(10)))/(2^(3)sin((pi)/(10)))`
Statement-2: `cos A.cos2A.cos2^(2)A.......cos(2^(n-1)A)=(sin(2^(n)A))/(2^(n)sinA)`

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