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RD SHARMA-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-Solved Examples And Exercises
- (tanA+tanB)/(tanA-tanB)=sin(A+B)/(sin(A-B)
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- Prove that: (cos 11^@+"sin"11^@)/(cos 11^@-"sin"11^@)=tan 56^@
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- Prove that: (cos8^@-"sin"8^@)/(cos8^@+"sin"8^@)=t a n 37^@
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- (cos9^@+sin9^@)/(cos9^@-sin9^@)= (a) tan 54^@ (b) tan 36^@ (d) None of...
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- Prove that: sin(60^0-theta)-cos(30^0+theta)=0.
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- Prove that: sin((4pi)/9+7)cos(pi/9+7)-cos((4pi)/9+7)sin("pi/9+7)=(sqrt...
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- Prove that: sin((3"pi")/8-5)cos("pi"/8+5)+cos((3"pi")/8-5)sin("pi"/8+7...
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- Prove that :(tan69^@+tan 66^@)/(1-tan 69^@tan66^@)=-1
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- If tanA=5/6 and tanB=1/(11),\ p rov e\ t h a t\ A+B=pi/4
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- If tanA=m/(m-1)\ and tanB=1/(2m-1), then prove that A-B=\ pi/4
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- Prove that: cos^2 45^@-sin^2 15^@=(sqrt(3))/4
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- Prove that: sin^2(n+1)A-sin^2n A="sin"(2n+1)A s in A
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- Prove that: (sin(A+B)+sin(A-B))/(cos(A+B)+cos(A-B))=t a n A
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- Prove that: (sin(A-B))/(cos A cosB)+(sin(B-C))/(cos B cos C)+(sin(C-A)...
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- Prove that: ("sin"(A-B))/(s in A s in B)+("sin"(B-C))/(s in B s in C)+...
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- Prove that: sin^2B=sin^2A+sin^2(A-B)-2sin A cos B sin(A-B)
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- Prove that: cos^2A+cos^2B-2cosA\ cos B cos\ (A+B)=sin^2(A+B)
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- Prove that: (tan(A+B))/(cot(A-B))=\ (tan^2A-tan^2B)/(1-tan^2Atan^2B)
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- If tan A= xtanB then prove that sin(A-B)/sin(A+B)=(x-1)/(x+1)
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- If tan(A+B)=x and tan(A-B)=y then find the values of tan2A and tan2B
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