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AAKASH SERIES-TRANSFORMATIONS AND INDENTITIES-EXERCISE -I
- cos20^(@)cos40^(@)-sin5^(@)sin25^(@)=
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- sin21^(@)cos9^(@)-cos84^(@) cos6^(@)=
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- (sin9^(@)-cos9^(@))/(sin48^(@)sin 12^(@))=
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- sin47^(@)+sin61^(@)-sin11^(@)-sin25^(@)=
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- ( sin 70^(@) + cos 40^(@) )/( cos 70^(@) + sin 40^(@))=
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- A+C=2B then (cosC-cosA)/(sinA-sinC)=
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- cos12^(@)+cos84^(@)+cos132^(@)+cos156^(@)=
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- If sin x+siny=1/4,cos x+cosy=1/3 then tan((x+y)/2)=
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- ((cosA+cosB)/(sinA-sinB))^(2012)+((sinA+sinB)/(cosA-cosB))^(2012)=
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- If alpha+beta=gamma. then cos^(2)alpha+cos^(2)beta+cos^(2)gamm...
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- If A+B+C=270^(@) then cos 2A+cos2B=cos2C+4sinA sinB sinC=
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- cos (alpha + beta + gamma ) + cos (alpha - beta - gamma) + cos ( beta ...
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- cos alpha sin (beta-gamma)+cos betasin (gamma-alpha+cos gamma sin (alp...
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- If sinA+sinB=l and cosA-cosA-cosB=m, then cos(A-B)=
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- If A+B+C=270^(@) then cos2A+cos2B+cos2C=
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