Prove that cos(pi/12)+cos(3pi/12)+cos(9p...

Prove that `cos(pi/12)+cos(3pi/12)+cos(9pi/12)+cos(11pi/12)=0`

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Prove that cos(pi/12)+cos(3pi/12)+cos(9pi/12)+cos(11pi/12)=0
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If X sin prove that 0 12 Sin Sin 12 2 tan20. 0 COS 12 AND cos. 12 12 0...
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Find the value of 2cos((5 pi)/(12))cos((pi)/(12)) and 2sin((5 pi)/(12)...
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cot ((pi) / (12)) + cot ((3 pi) / (12)) + cos ((9 pi) / (12)) + cos ((...
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Find the value of cos""(pi)/(12)(sin""(5pi)/(12)+cos""(pi)/(4))+sin"...
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(sin .(5pi)/(12)-sin.(pi)/(12))/(cos.(5pi)/(12)+cos .(pi)/(12) ) = (1)...
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सिद्ध कीजिए कि : sin.(pi)/(4)cos.(pi)/(12)+cos.(pi)/(4)sin.(pi)/(12)=(...
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cos(pi/12)+sin^2((3pi)/12)+sin^2((9pi)/12)+cos((11pi)/12)=...
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सिद्ध कीजिए की: (sin 75^(@) - sin 15^(@))/( cos 75^(@) +cos 15^(@))...
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