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tan-2-7-tan-2-3-7-tan-2-5-7-




Question Number 171479 by som(math1967) last updated on 16/Jun/22
 tan^2 (𝛑/7) +tan^2 ((3𝛑)/7) +tan^2 ((5𝛑)/7)=?
$$\:\boldsymbol{{tan}}^{\mathrm{2}} \frac{\boldsymbol{\pi}}{\mathrm{7}}\:+\boldsymbol{{tan}}^{\mathrm{2}} \frac{\mathrm{3}\boldsymbol{\pi}}{\mathrm{7}}\:+\boldsymbol{{tan}}^{\mathrm{2}} \frac{\mathrm{5}\boldsymbol{\pi}}{\mathrm{7}}=? \\ $$
Commented by som(math1967) last updated on 16/Jun/22
re post of  qno.171389
$$\boldsymbol{{re}}\:\boldsymbol{{post}}\:\boldsymbol{{of}}\:\:\boldsymbol{{qno}}.\mathrm{171389} \\ $$
Commented by greougoury555 last updated on 16/Jun/22
Commented by som(math1967) last updated on 16/Jun/22
thank you
$$\boldsymbol{{thank}}\:\boldsymbol{{you}} \\ $$
Commented by Tawa11 last updated on 16/Jun/22
Great sir
$$\mathrm{Great}\:\mathrm{sir} \\ $$
Commented by SLVR last updated on 16/Jun/22
nice sir
$${nice}\:{sir} \\ $$
Answered by som(math1967) last updated on 16/Jun/22
Commented by som(math1967) last updated on 16/Jun/22
if any other easy way please  post
$$\boldsymbol{{if}}\:\boldsymbol{{any}}\:\boldsymbol{{other}}\:\boldsymbol{{easy}}\:\boldsymbol{{way}}\:\boldsymbol{{please}} \\ $$$$\boldsymbol{{post}} \\ $$

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