Editor
Editor
 Sep 18, 2022
0
If $90^{\circ}<\alpha<180^{\circ}<\beta<360^{\circ}$, then which of the following cannot be true?
Difficulty: Easy
A: 
$\sin\alpha=\cos\beta$
B: 
$\sin\alpha=\sin\beta$
C: 
$\tan\alpha=\sin\beta$
D: 
$\sec\alpha=\csc\beta$
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