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The number of solutions of equations 3co...

The number of solutions of equations `3cos2theta+5costheta =1` in `[0,2pi]` is

A

8

B

6

C

4

D

2

Text Solution

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The correct Answer is:
D
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AAKASH INSTITUTE-TRIGNOMETRIC FUNCTIONS -Section-B (Objective Type Questions One option is correct)
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  2. If x in (0, 1), then greatest root of the equation sin2pix=sqrt2cospix...

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  3. The number of solutions of equations 3cos2theta+5costheta =1 in [0,2pi...

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  4. The general solution of the equations tantheta=-1 and costheta=1/sqrt(...

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  5. The number of the solutions of the equation 3sinx + 4cosx-x^2-16 = 0 i...

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  6. solve sin^4x=1+tan^8x

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  7. If theta in (0, 2pi) and 2sin^2theta - 5sintheta + 2 > 0, then the ran...

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  8. If theta in (0, 2pi) and 2sin^2theta - 5sintheta + 2 > 0, then the ran...

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  9. The general solution of the equation tan2theta tan3theta=1 is

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  10. If m, n in N( n> m), then number of solutions of the equation n|sin...

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  11. If sinA = sinBandcosA=cosA=cosB, then which one of the following is c...

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  12. The number of values of x int [-2pi, 2pi] satisfying tanx + cotx 2" c...

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  14. The general solution of the equation tanx/ (tan2x) + (tan2x)/tanx +2 =...

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  15. The solution of the equation cos^2theta-2costheta=4sintheta-sin2theta ...

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  16. The general solution of sin^2 theta sec theta +sqrt3 tan theta=0 is (n...

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  17. If sinx+cosx=sqrt(y+1/y), y gt 0, x in[0,pi], then find the least valu...

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  18. The -number of solutions of the equation cos(pisqrt(x-4)cos(pi sqrtx)=...

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  19. The number of solutions of sum(r=1)^6 cos(rx)=6 in

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  20. The number of values of x for which sin2x + cos4x = 2 is

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