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The number of integral values of k for w...

The number of integral values of k for which the equation `7 cos x +5 sin x=2 k+1` has a solution, is

A

4

B

8

C

0

D

12

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-REVISION EXERCISE-THRIGONOMETRIC EQUATIONS
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  2. If 32 tan^(8) theta=2 cos^(2) alpha-3 cos alpha and 3 cos 2 theta=1, t...

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  3. The number of integral values of k for which the equation 7 cos x +5 s...

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  4. Nuber of distinct solutions of sec theta+ tan theta= sqrt(3), 0 le the...

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  5. The solution of sin^(4) x=1+cos^(6) x is x=

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  6. If 4 sin^(2)x-8 sinx+3 le 0,0 le x le 2pi, x in

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  7. The solution set of sin x lt 1 is

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  8. The solution set of cos x gt 0 is

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  9. The values of x between 0 and 2pi satsifying sinx sqrt(8cos^(2)x)=1 ar...

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  10. If Sin^(4)2x+Cos^(4)2x=Sin2xCos2 then x=

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  11. The number of solution of sqrt(6-cos+7 sin^(2)x)+ cosx=0

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  12. If |Cosx|^(sin^(2)x-(3)/(2)sinx+(1)/(2))=1 then x=

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  13. The least difference between the roots of 4 cosx(2-3 sin^(2)x)+(cos2x+...

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  14. Common roots of the equations of cos2x+sin2x=cotx and 2cos^(2)x+ cos^(...

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  15. The range of alpha for which the equation sin^(4)x+cos^(4)x+sin2x+alph...

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  16. The general solution of the equation (1-sinx+sin^(2)x...+(-1)^(n)sinx....

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  17. If sin alpha cos beta=-(1)/(2), then cos alpha sin beta may be belong ...

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  18. If x=X cos theta- Y sin theta, y= X sin theta+ Y cos theta and x^(2)+4...

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  19. If 20 sin^(2) alpha+21 cos alpha-24=0 where (7pi)/(4) lt alpha lt 2pi ...

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  20. A : The general solution of sin x = -1 is n pi + (-1)^(n)(3pi)/(2), n ...

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