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If cos A = 3/4 then the value of 32sin( ...

If `cos A = 3/4` then the value of `32sin( A/2)* sin (5A/2)` is_____.

A

`sqrt(7)`

B

`-sqrt(7)`

C

7

D

`-7`

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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-TRIGONOMETRY -EXERCISES (Multiple Choice Questions)
  1. In DeltaABC,cosecA(sinBcosC+cosBsinC)=?

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  2. If for real values of costheta=x+(1)/(x), then

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  3. If cos A = 3/4 then the value of 32sin( A/2)* sin (5A/2) is.

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  4. If sintheta(1)+sintheta(2)+sintheta(3)=3, then costheta(1)+costheta(2)...

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  5. If sintheta=(24)/(25)andtheta is in second quadrant, then sectheta+tan...

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  6. (cos17^(@)+sin17^(@))/(cos17^(@)-sin17^(@))=?

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  7. If sinalpha=(-3)/(5), where piltalphalt(3pi)/(2), then cos""(alpha)/(2...

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  8. The greatest value of the function sqrt(3)sinx+cosx is

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  9. costheta(tantheta+2)(2tantheta+1)=?

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  10. If x and y are the angles lying in the second quadrant and xlty, then ...

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  11. If 0^(@)ltthetalt90^(@), then ((5costheta-4)/(3-5sintheta)-(3+5sinthet...

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  12. If alpha is a positive acute angle and 2sin alpha+15cos^(2)alpha=7, th...

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  13. If 3tantheta+4=0 where (pi)/(2)lt thetaltpi, then the value of 2cot th...

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  14. If sec^(2)theta=3, 0^(@)ltthetalt(pi)/(2), then the value of (tan^(2)t...

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  15. If 3costheta-sintheta=(1)/(sqrt(2)),(0^(@)ltthetalt90^(@)), then the v...

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  16. If tantheta-cottheta=0(0^(@)ltthetalt90^(@)), then the value of sinthe...

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  17. If sinA+cosecA=3, then find the value of (sin^(4)A+1)/(sin^(2)A).

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  18. cos7^(@)cos23^(@)cos45^(@)cosec83^(@)cosec67^(@)=?

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  19. If (tantheta+cottheta)/(tantheta-cottheta)=2,(0^(@)lethetale90^(@)), t...

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  20. If sinx+cosx=c, then sin^(6)x+cos^(6)x is equal to

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