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if sin4A=4sinAcos^3A-4cosAsin^3A Dividin...

if `sin4A=4sinAcos^3A-4cosAsin^3A` Dividing numerator and denominator on the R.H.S. by `cos^4A` prove that
`sin4A=(4tanA(1-tan^2A))/(1+tan^2A)^2`

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A N EXCEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-QUESTION BANK
  1. Given that 1-costheta=2sin^2(theta/2) and 1+costheta=2cos^2(theta/2)de...

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  2. Writing 4A=2xx2A prove that sin4A=4sinAcos^3A-4cosAsin^3A

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  3. if sin4A=4sinAcos^3A-4cosAsin^3A Dividing numerator and denominator on...

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  4. cosecA=1/sinA and cotA=cosA/sinA prove cosecA-cotA=tan(A/2)

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  5. Given that 1-costheta=2sin^2(theta/2) and 1+costheta=2cos^2(theta/2)de...

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  6. Given that tantheta=a/b find sin2theta and cos2theta

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  7. Given that tantheta=a/b prove that bcos2theta+asin2theta=b

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  8. Solve 2cos^2t+3sint=0

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  9. Solve sin2theta+costheta=0

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  10. solve sqrt3 costheta+sintheta=sqrt2

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  11. Find the principle and general solution of the following. tan x = s...

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  12. Find the principal and general solutions of the following equations s...

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  13. Find the principal and general solutions of the following equations ...

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  14. Find the principle and general solution of the following. cosec x =...

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  15. Find the general solution of the following equations cos 4x = cos 2x

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  16. Find the general solution of the following equations cos 3x+cos x-co...

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  17. Find the general solution of the following equations sin 2x+ cos x =...

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  18. Find the general solutions for each of the following equations sec^2 2...

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  19. Find the solution of the equation sinx+sin3x+sin5x=0

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  20. What is the principal value of theta if tantheta=-sqrt3?

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