4.若a=cos235°-sin235°，b=2cos240°-1，c=2sin270°-1，，則下列何者為真？(A)a最大(B)c<0 (C)d>c (D)a>b (E)a&gt

問題詳情

4.若a=cos235°-sin235°，b=2cos240°-1，c=2sin270°-1，

，則下列何者為真？
(A)a最大
(B)c<0
(C)d>c
(D)a>b
(E)a>d

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(3),D(0),E(0)

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