Editor
Editor
 Sep 18, 2022
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$\int_{0}^{\frac{\pi}{4}} \frac{\sinx-1}{\cos^{2}x} dx$ is equal to:
Difficulty: Easy
A: 
$2-\sqrt{2}$
B: 
$\sqrt{2}$
C: 
$\sqrt{2}-2$
D: 
$\sqrt{2}+2$
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NETNUST Entry TestMathematicsIntegration