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12. 已知 sinθ + cosθ = ,則secθ + cscθ =?(A) - 4(B) - 4 (C) - 6(D) - 6
問題詳情
12. 已知 sinθ + cosθ =
,則secθ + cscθ =?
(A) - 4
(B) - 4
(C) - 6
(D) - 6
參考答案
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