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Mathematics
Mathematics
Problem
Evaluate the principal value of
cos
−
1
(
−
3
2
)
\cos^{-1}\left(-\dfrac{\sqrt{3}}{2}\right)
cos
−
1
(
−
2
3
)
. a)
2
π
3
\dfrac{2\pi}{3}
3
2
π
b)
5
π
6
\dfrac{5\pi}{6}
6
5
π
c)
7
π
6
\dfrac{7\pi}{6}
6
7
π
d)
π
6
\dfrac{\pi}{6}
6
π
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