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RD SHARMA-TRIGONOMETRIC RATIOS OF MULTIPLE AND SUBMULTIPLE ANGLES-Solved Examples And Exercises
- If 5 sinalpha=3"sin"(alpha+2beta)!=0, then tan(alpha+beta) is equal ...
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- If tantheta=a/b ,then bcos2theta+asin2theta is equal to (a) a (b) b ...
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- Prove that: cos^2A+cos^2(A+(2pi)/3)+cos^2(A-(2pi)/3)=3/2
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- If 2tanalpha=3t a nbeta,t h e ntan(alpha-beta)= (a)(sin2beta)/(5-cos2...
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- Prove that: sin^2 24^@-sin^2 6^@=(sqrt(5)-1)/8
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- What is the value of cos36^@ .
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- Prove that: sin^2 24^0-sin^2 6^0=(sqrt(5)-1)/8
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- Prove that: cos18^0=(sqrt(10+2sqrt(5)))/4 .
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- If t a ntheta/2=sqrt((1-e)/(1+e))tan(alpha/2), then cosalpha= (a) 1-...
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- If cos2x+2cosx=1t h e n ,(2-cos^2x)sin^2x is equal to
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- If alphaa n dbeta are acute angles satisfying cos2alpha=(3cos2beta-1)/...
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- Prove that: cos^2A+cos^2(A+pi/3)+cos^2(A-pi/3)=3/2
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- Prove that: cos^(2)48^(@)-sin^(2)12^(@)=(sqrt(5)+1)/(8)
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- The value of (sin5alpha-sin3alpha)/(cos5alpha+2cos4alpha+cos3alpha) is
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- If costheta=1/2(a+1/a),cos3theta=lambda(a^3+1/(a^3)),t h e nlambda= ...
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- Prove that: t a nA+tan(60^0+A)-t a n(60^0-A)=3t a n3A
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- If t a n^2theta=2tan^2phi+1 , prove that cos2theta+sin^2phi=0.
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- If theta=pi/(2^n+1) , prove that: 2^ncosthetacos2thetacos2^2 cos2^(n-1...
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- Prove that: cotA+"cot"(60^0+A)-cot(60^0-A)=3cot3A
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- Prove that: cos^2 48^0-sin^2 12^0=(sqrt(5)+1)/8
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