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The number of solutions of sum(r=1)^6 c...

The number of solutions of `sum_(r=1)^6 cos(rx)=6` in

A

Zero

B

1

C

6

D

12

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE-TRIGNOMETRIC FUNCTIONS -Section-B (Objective Type Questions One option is correct)
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  3. The number of solutions of sum(r=1)^6 cos(rx)=6 in

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  8. 4sin^4x+cos^4x=1 if

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  9. The number of values of theta in [0,2pi] satisfying r sintheta=sqrt3 a...

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  10. The arithmetic mean of the roots of the equation 4cos^3x-4cos^2x-cos(3...

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  11. The equation 2sin^(2)x=8-k(2-sinx) possesses a solution if

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  16. In triangleABC, if acosA=bcosB, then the triangle is

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  18. ln a DeltaABC, if (cosA)/a=(cosB)/b=(cosC)/c and the side a = 2, then ...

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  19. If cotA/2 = (b+c)/a, then triangleABC, is

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