Question 1011315
Use the power - reduction formula to find the exact value of sin ( pi/12) 
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sin(pi/12) = sin((1/2)(pi/6)) =  sqrt[(1-cos(pi/2))/2]
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= sqrt[(1-sqrt(3)/2)/2]
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= sqrt[(2-sqrt(3))/4]
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= sqrt[(1/2) - (sqrt(3)/4]
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Cheers,
Stan H.
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