Find-the-value-of-sin-2-9pi-10-sin-2-7pi-10-

Question Number 133950 by liberty last updated on 25/Feb/21

Find the value of

\sin^{2} (\frac{9 π}{10}) . \sin^{2} (\frac{7 π}{10}) .

Answered by bobhans last updated on 25/Feb/21

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