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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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