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sin(27π/2) = sin(27π/2 - 2nπ) = sin[(27-4n)π/2] = sin[(27-28)π/2] = sin(-π/2) = -1
keywords: of,at,number,value,Sin,pi,given,27,function,exact,Find,trigonometric,real,the,Sin (27pi/2) Find the exact value of the trigonometric function at the given real number
