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Problem
Problem
Find the value of
cos
−
1
(
cos
2
π
3
)
+
sin
−
1
(
sin
2
π
3
)
\cos^{-1}\left(\cos \frac{2\pi}{3}\right) + \sin^{-1}\left(\sin \frac{2\pi}{3}\right)
cos
−
1
(
cos
3
2
π
)
+
sin
−
1
(
sin
3
2
π
)
.
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