Editor
Editor
 Sep 18, 2022
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$\cos^{-1}(\cos\frac{5\pi}{4})$=
Difficulty: Easy
A: 
$\frac{5\pi}{4}$
B: 
$\frac{-5\pi}{4}$
C: 
$\frac{-3\pi}{4}$
D: 
$\frac{3\pi}{4}$
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NETNUST Entry TestMathematicsInverse Trigonometric Functions