[MNR 1993]
A) $ \sin \theta =-\frac{1}{5} $
B) $ \cos \theta =1 $
C) $ \sec \theta =\frac{1}{2} $
D) $ \tan \theta =20 $
Correct Answer: C
Incorrect statement is $ \sec \theta =\frac{1}{2} $ , because value of $ \sec \theta $ is always $ \ge 1 $ .
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