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prove that : (sinA+2sin3A+sin5A)/(sin3A+...

prove that : `(sinA+2sin3A+sin5A)/(sin3A+2sin5A+sin7A)=(sin3A)/(sin5A)`

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RD SHARMA ENGLISH-TRANSFORMATION FORMULAE-All Questions
  1. Prove that: (sin11 A\ sin A+sin7A\ sin3A)/(cos 11\ A\ sin A+cos7Asin3A...

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  2. Prove that: (sinA+sin3A+sin5A+sin7A)/(cosA+cos3A+cos5A+cos7A)=tan4A

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  3. prove that : (sinA+2sin3A+sin5A)/(sin3A+2sin5A+sin7A)=(sin3A)/(sin5A)

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  4. Prove that: (sin(theta+varphi)-2sintheta+"sin"(theta-varphi))/(cos(the...

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  5. Prove that: sinalpha+sinbeta+singamma-sin(alpha+beta+gamma)=4sin((alph...

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  6. Prove that: cos(A+B+C)+cos(A-B+C)+cos(A+B-C)+cos(-A+B+C)=4cos A\ cos B...

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  7. If (cos(A-B))/("cos"(A+B))+("cos"(C+D))/("cos"(C-D))=0,\ prove tht ta...

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  8. If cos(alpha+beta)sin(gamma+delta)="cos"(alpha-beta)"sin"(gamma-delta)...

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  9. If (cosalpha+cosbeta)^2+(sinalpha+sinbeta)^2=lambdacos^2((alpha-beta)/...

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  10. If sin A+sin B=alpha\ a n d\ cos A+cos B=beta, then write the value of...

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  11. If cos A=m cos B , then write the value of cot((A+B)/2)cot((A-B)/2dot)

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  12. Write the value of the expression (1-4sin1 0^0sin7 0^0)/(2sin1 0^0)

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  13. If A+B=pi/3a n dcosA+cos B=1, then find the value of cos((A-B)/2dot)

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  14. Write the value of sin 12^0sin48^0sin54^0dot

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  15. If sin2A=lambdasin2B , then write the value of (lambda+1)/(lambda-1) .

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  16. Write the value of (sin A+sin3A)/(cos A+cos3A) .

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  17. If cos(A+B)sin(C-D)="cos"(A-B)"sin"(C+D) , then write the value of t a...

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  18. cos 40^0+cos 80^0+cos 160^0+cos 240^0= a. 0 b. 1 c. 1//2 d. -1//2

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  19. sin 163^0cos 347^0+sin 73^0sin 167^0= a.1//2 b. 1 c. 0 d. none of the...

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  20. If sin2theta+sin2varphi=1/2a n d\ cos2theta+cos2varphi=3/2 , then cos^...

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