90年學力測驗考題 相關單元: 2-2-4

sinx=, <x<p,則下列選項何者為真?
(A)cosx=  (B)tanx=  (C)cotx=
-  (D)secx=-
(E)cscx=
                                                                                                      解答:(C)(D)(E)

<Sol.>

ðð

sinx

cscx

cosx

secx

tanx

cotx