allery$\sec\theta \cdot \cos\theta$ equals (where defined):
A$0$
B$1$
C$\sin\theta$
D$\tan\theta$
Answer & Solution
Correct answer: B. $1$
$\sec\theta = 1/\cos\theta$, so $\sec\theta \cdot \cos\theta = (1/\cos\theta) \cdot \cos\theta = 1$.
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