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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-EXERCISE-1
- If sinalpha=3//5 and 90^(@)ltalphalt180^(@) then cos3alpha=
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- If sin(alpha+beta)=1 and sin(alpha-beta)=1/2 where alpha,beta in [0,pi...
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- If costheta=-3/5 and 180^(@)ltthetalt270^(@) then "tan"theta/2=
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- 3 cos72^(@)-4" sin"18^(@)=
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- 3sin6^(@)-4cos^(3)84^(@)=
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- cos^(2)""(3pi)/(5)+cos^(2)""(4pi)/(5)=
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- If A+B=60^(@) then cos^(2)A+cos^(2)B-cosA cosB=
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- If A-B=60^(@) then Sin^(2)A+Sin^(2)B-SinASinB=
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- If A+B=60^(@) then Sin^(2)A+sin^(2)B-sinA SinB=
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- Prove that cos^(2)76^(@)+cos^(2)16^(@)-cos76^(@)cos16^(@)=(3)/(4)
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- Sin^(2)27^(@)+Sin^(2)87^(@)+Sin^(2)33^(@)=
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- Cos^(2)20^(@)+Cos^(2)40^(@)+cos^(2)80^(@)=
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- cos20^(@)cos40^(@)cos60^(@)cos80^(@)=
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- cos^(3)110^(@)+cos^(3)10^(@)+cos^(3)130^(@)=
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- If tan theta + tan ( theta + (pi)/(3))+ tan ( theta + (2pi)/(3))=3 , ...
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- tan "" (pi)/(5) + 2 tan "" (2pi)/(5) + 4 cot "" (4pi)/(5)=
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- (sin3theta)/(1+2cos2theta)=
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- If 180^(@) lt theta lt 270^(@) , sin theta =-3//5 , then cos theta //...
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- cos 36^@ - cos72^@ =
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- Sin12^(@).Sin24^(@).Sin48^(@)Sin84^(@)=
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