10 下列選項何者正確，其中 ：
(A)cos(3+ 2i) = cos(3) cos(2) − isin(3)sin(2)
(B)cos(3+ 2i) = cos(3) cos(2) + isin(3)sin(2)
(C)cos(3+ 2i) = cos(3) cosh(2) − isin(3)sinh(2)
(D)cos(3+ 2i) = cos(3) cosh(2) + isin(3)sinh(2)

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統計： A(0), B(0), C(4), D(0), E(0) #1031482