Math, asked by mahichoudhary0, 1 year ago

sin^2pai/18 +sin^2 8pai/18 value

Answers

Answered by Rohitdas800

sin2pi/18 + sin2pi/9 + sin2 7pi/18 + sin24pi/9

=sin2pi/18 + sin27pi/18 + sin2 (pi/2-7pi/18) + sin2(pi/2-pi/18)

=sin2pi/18+ cos2pi/18 + sin27pi/18 + cos27pi/18

1 +1

= 2

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