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If (2cosx-1)(3+2cosx)=0, 0lexle2pi, then...

If `(2cosx-1)(3+2cosx)=0, 0lexle2pi,` then x=

A

`(pi)/(3)`

B

`(pi)/(3),(5pi)/(3)`

C

`(pi)/(2),(5pi)/(3),cos^(-1)(-(3)/(2))`

D

`(5pi)/(3)`

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The correct Answer is:
B
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
  1. If tantheta=-(1)/(sqrt(3)),sintheta=(1)/(2)andcostheta=-(sqrt(3))/(2),...

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  2. If cosptheta=cosqtheta, pneq, then

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  3. If (2cosx-1)(3+2cosx)=0, 0lexle2pi, then x=

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  4. If sin((pi)/(4)costheta)=cos((pi)/(4)tantheta), then theta is equal to

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  5. If tan2thetatantheta=1, then the general value of theta is

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  6. The general value theta obtained from the equation cos3theta=sinalpha ...

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  7. If sin 6 theta + sin 4 theta + sin 2 theta = 0 Then the general valu...

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  8. If sin5x+sin3x+sinx=0 ,then the value of x other than 0 lying between ...

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  9. sinx+sin3x+sin5x=0

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  10. The number of solutions of the equation sinx-sin2x+sin3x=2cos^(2)x-cos...

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  11. The value of x in (0,(pi)/(2)) satisfying the equation sin x cos x =(1...

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  12. If sintheta= costheta=1, then find the general value of theta.

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  13. sqrt(2)sectheta+tantheta=1

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  14. sqrt(3)costheta+sintheta=2

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  15. sin6theta+sin4theta+sin2theta=0,"then "theta=

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  16. sintheta+sin7theta=sin4theta

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  17. Solve (tan3x-tan2x)/(1+tan3xtan2x ')=1

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  18. (tan3theta-1)/(tan3theta+1)=sqrt(3), then the general value of theta i...

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  19. If sin2theta=cos3thetaa n dtheta is an acute angle, then sintheta equa...

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  20. Find the gereral of the equation sinx-3sin2x+sin3x=cosx-3cos2x+cos3x.

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