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The equation kcosx-3sinx=k+1 is solvable...

The equation `kcosx-3sinx=k+1` is solvable only if `K in`

A

`[4,oo]`

B

`[-4,4]`

C

`(-oo,4]`

D

R

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The correct Answer is:
C
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AAKASH SERIES-TRIGONOMETRIC EQUATIONS-Exercise-II
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  4. If (2+sqrt(3))cosx=1-sinx then x =

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  7. If 3sinx+4cosx=5 then the value of tan(x//2) is

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  8. If sintheta+sin3theta+sin5theta=0,0lethetale(pi)/(2) then theta =

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  11. The solution set of the equation sin3theta=4sintheta(sin^(2)x-sin^(2...

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  12. If the solutions of cosp theta+cosqtheta=0 are I A.P. the the common d...

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  13. If tan px = cot qx, then the solutions are in A.P. with common differe...

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  14. If sin((picottheta)/(4))=cos((pitantheta)/(4)) and theta is in the fir...

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  15. If tan(picostheta)=cot(pisintheta), then prove that cos(theta-(pi)/(4...

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  16. The solutions of the system of equations x+y=2pi//3 and cos x + cos y ...

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  17. If -pilexlepi,-pileylepi and the cosx+cosy=2 then cos(x-y) =

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  18. If sinA=sinBandcoA=cosB then A =

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  19. If tantheta+tan4theta+tan7theta=tanthetatan4thetatan7theta then theta ...

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  20. If (1+tantheta)(1+tanphi)=2 then theta+phi =

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