Editor
Editor
 Sep 18, 2022
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The circular measure of the angle between the hands of a watch at 4 O'clock is
Difficulty: Easy
A: 
$\frac{\pi}{2}$
B: 
$\frac{\pi}{4}$
C: 
$\frac{2\pi}{3}$
D: 
$\frac{\pi}{6}$
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NETNUST Entry TestMathematicsTrigonometric Identities of Sum and Difference of Angles