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RD SHARMA ENGLISH-TRANSFORMATION FORMULAE-All Questions
- Prove that 4sinthetasin(pi/3+theta)sin((2pi)/3+theta)=sin3theta
04:38
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- Express each of the following as the sum or difference of sines and ...
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- Express each of the following as the sum or difference of sines and ...
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- Express each of the following as the sum or difference of sines and ...
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- Express each of the following as the sum or difference of sines and ...
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- Prove that; 2sin((5pi)/12)sin(pi/12)=1/2
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- Prove that 2sin((5pi)/12)cos(pi/12)=(2+sqrt3)/2
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- Find the value of 2cos((5pi)/12) cos(pi/12) and 2sin((5pi)/12)cos(pi/1...
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- Show that: sin 50^0cos85^0=(1-sqrt(2)sin35^0)/(2sqrt(2))
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- sin25^@cos115^@=1/2(sin40^@-1)
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- Prove that: 4\ costhetacos\ (pi/3+theta)cos(pi/3-theta)=cos3theta
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- Prove that: cos 10^0cos30^0cos 50^0cos 70^0=3/(16)
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- Prove that: sin20^0sin40^0sin80^0=(sqrt(3))/8
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- Prove that: t a n 20^0tan40^0tan60^0tan80^0=3
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- Prove that: \ sin 10^0sin 50^0sin 60^0sin 70^0=(sqrt(3))/(16)
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- Prove that: cos40^0cos80^0cos 160^0=\ -1/8
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- Prove that: \ cos 20^0cos 40^0cos 80^0=1/8
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- Prove that: \ t a n 20^0t a n 30^0t a n 40^0t a n 80^0=1
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- Prove that: sin20^0sin40^0sin60^0sin80^0=3/(16)
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- Prove that: (sin5A-sin3A)/(cos5A+cos3A)=t a n A
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