Editor
Editor
 Sep 18, 2022
0
$\cos^{-1}(-x)$=
Difficulty: Easy
A: 
-x
B: 
1/x
C: 
$\tan^{-1}x$
D: 
$\pi-\cos^{-1}x$
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NETNUST Entry TestMathematicsInverse Trigonometric Functions