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For any DeltaABC, prove that a(b cos C...

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

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MAXIMUM PUBLICATION-TRIGONOMETRIC FUNCTIONS-EXAMPLE
  1. Find the general solution of the following equations cos 3x+cos x-co...

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

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

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

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

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

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

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

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

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

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

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

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  13. Find the value of sin 15^@ .

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

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

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  16. A tree stands vertically on a hill side which makes an angle of 15^@...

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  17. if sin x= cox x, x in[o,pi] then is

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  18. Write the following in ascending order of its values <> sin 100^@,sin0...

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  19. Solve: sin 2x-sin 4x+sin 6x =0

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  20. Find the degree measure corresponding to 11/14 radians. (use pi=22/7)

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