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[" C-4.(B) "(-1)/(5)" (D) "4],[" 年 "(" I...

[" C-4.(B) "(-1)/(5)" (D) "4],[" 年 "(" If "cos A=3/4," then the value of "16cos^(2)(A/2)-32sin(A/2)sin(5A/2)" is ")/((B)-4)" (B) "-3]

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