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prove the following (cos4x+cos3x+cos2...

prove the following
`(cos4x+cos3x+cos2x)/(sin4x+sin3x+sin2x)=cot3x`

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MAXIMUM PUBLICATION-TRIGONOMETRIC FUNCTIONS-EXAMPLE
  1. prove the following (sin3x)/(1+2cos2x)=sinx

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  2. prove the following sin^2 6x-sin^2 4x =sin2xsin10x

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  3. prove the following (cos4x+cos3x+cos2x)/(sin4x+sin3x+sin2x)=cot3x

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

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

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

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  7. In Triangle ABC, if a=25, b=52 and c=63, find cos A and sin A.

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  8. For any DeltaABC, prove that a(b cos C -c cos B) = b^2 - c^2

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  9. For any DeltaABC, prove that (sin(B-C))/(sin(B+C))=(b^2-c^2)/(a^2)

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  10. convert 2pi/3 radian measure into degree measure.

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  11. Prove that (sin 5x+sin3x)/(cos 5x+cos3x)=tan4x

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  12. For any DeltaABC, prove that (a+b)/c=cos((A-B)/2)/sin(c/2)

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  13. For any DeltaABC, prove that sin ((B-C)/2)=(b-c)/a cos (A/2)

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  14. Which of the following is not possible. sin x= 1/2

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  15. Which of the following is not possible. cos x= 2/3

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  16. Which of the following is not possible. cosec x= 1/3

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  17. Which of the following is not possible. tan x= 8

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  18. Find the value of sin 15^@ .

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  19. Hence write the value of cos 75^@.

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  20. The angle of elevation of the top point P of the vertical tower PQ of ...

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