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Mathematics
Mathematics
Problem
Find the principal value of
17
π
3
\dfrac{17\pi}{3}
3
17
π
that lies between
0
0
0
and
2
π
2\pi
2
π
, and hence determine
cos
(
17
π
3
)
\cos\left(\dfrac{17\pi}{3}\right)
cos
(
3
17
π
)
.
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