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The equation cos^(4)x-(a+2)cos^(2)x-(a+3...

The equation `cos^(4)x-(a+2)cos^(2)x-(a+3)=0` possesses a solution if

A

`a gt - 3`

B

`a lt - 2`

C

`-3 le a le -2`

D

a is any positive integer

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC EQUATIONS -EXERCISE 1
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  6. The equation sin^(4)x -2cos^(2)x + a^(2)=0 is solvable if

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  7. The equation cos^(4)x-(a+2)cos^(2)x-(a+3)=0 possesses a solution if

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  8. If (1)/(6) sin x, cos x, tan x are in G.P. then x is equal to

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  9. The minimum value of 2^(sin x)+2^(cos x) is

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  14. In a triangle ABC, angle A gt angle B. If the measures of angle A, ang...

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  15. If alpha, beta are different values of x satisfying a cos x + b sin x ...

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  16. If alpha, beta are solutions of a cos x + b sin x = c then cos alpha +...

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  17. If alpha, beta are solutions of a cos x + b sin x = c then sin alpha +...

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  18. If alpha, beta are the solutions of a cos 2theta + b sin 2theta = c, t...

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  19. If alpha, beta are different values of theta satisfying the equation 5...

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  20. If alpha, beta are solutions of a tan theta + b sec theta = c then ta...

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