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Mathematics
Mathematics
Problem
Find the value of
sin
(
−
5
π
6
)
+
cos
(
−
π
3
)
\displaystyle \sin\!\left(-\dfrac{5\pi}{6}\right)+\cos\!\left(-\dfrac{\pi}{3}\right)
sin
(
−
6
5
π
)
+
cos
(
−
3
π
)
.
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