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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-All Questions
- If sinA=3/5 and cosB=9/41, 0 < A < pi/2 and 0 < B < pi/2 then find the...
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- If cos A=4/(5), cosB=12/13 and (3pi)/2 < A, B < 2pi then find the valu...
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- Find the values of the following: t a n 15^0 ii. t a n 75^0
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- Find the values of the following: (i)tan105^0 ( ii.) tan((13pi)/12)
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- Evaluate the following: sin(7pi)/(12)cospi/4-cos(7pi)/(12)sinpi/4
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- Evaluate the following: cos(2pi/3)cos(pi/4)-sin(2pi/3)sin(pi/4)
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- Prove that: cos(pi/4-A)cos(pi/4-B)-sin(pi/4-A)sin(pi/4-B)="sin"(A+B)
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- Prove that: sin(n+1)A sin(n+2)A+cos(n+1)A cos(n+2)A=cos A
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- Prove that: cos(pi/4+x)+cos(pi/4-x\ )=sqrt(2)cosx
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- Prove that: cos((3pi)/4+x)-cos((3pi)/4-x\ )=sqrt(2)sinx
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- Prove that: sin(x+y)/sin(x-y)=(tanx+tany)/(tanx-tany)
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- Prove that (tan(pi/4+x))/(tan(pi/4-x))=((1+t a n x)/(1-t a n x))^2
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- if tanalpha=1/(sqrt(x(x^2+x+1))), tanbeta=(sqrtx)/(sqrt(x^2+x+1) and ...
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- Prove that :(tan(A+B))/("cot"(A-B))=(sin^2A-sin^2B)/(cos^2A-sin^2B)
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- Prove that : sin^2 6x-sin^2 4x=sin 2x\ sin\ 10 x
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- Prove that: cos^2 2x-cos^2 6x= sin4x sin8x
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- Prove that: (cos^2 33^@-cos^2 57^@)/(sin^2(21/2)^@-sin^2(69/2)^@)=-sqr...
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- Prove that: cos2alpha\ cos2beta+sin^2(alpha-beta)-sin^2(alpha+beta)=co...
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- Prove that: t a n 70^0=t a n 20^0+2t a n 50^0dot
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- If sin alpha+sin beta=a\ a n d\ cosalpha+cosbeta=b , show that : cos(a...
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