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Nice trigonometry problem
Nice trigonometry problem
Source:
March 31, 2015
trigonometry
algebra
Problem Statement
Prove the equality:\\
tan
(
3
π
7
)
−
4
sin
(
π
7
)
=
7
\tan (\frac{3\pi}{7})-4\sin (\frac{\pi}{7})= \sqrt{7}
tan
(
7
3
π
)
−
4
sin
(
7
π
)
=
7
.
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