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Minimum value of 24 cos^(2) x+ 16 sec^(2...

Minimum value of `24 cos^(2) x+ 16 sec^(2) x ` is

A

9

B

16

C

25

D

40

Text Solution

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 G ( VARIATION IN TRIGONOMETRIC FUNCTIONS )
  1. For x in R , 3 cos (4x-5) +4 lies in the interval

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  2. The range of 8 cos theta - 15 sin theta is

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  3. If A= cos theta + 2 sqrt(2) sin theta , then for all real values of t...

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  4. If y=1+4sin^2 x cos^(2) x , then

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  5. The value of cos theta + 3sqrt(2) sin ( theta + pi//4) + 6 lies betw...

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  6. If f(x)=sin^(6) x + cos^(6) x for x in R , then f(x) lies in the int...

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  7. Minimum value of 4 tan x + 9 cot x is

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  8. Minimum value of 5sec x + 4 tan x is

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  9. Minimum value of sin^(2) theta + "cosec"^(2) theta is

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  10. Minimum value of 24 cos^(2) x+ 16 sec^(2) x is

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  11. The least value of 4 sec^(2) theta + 9 " cosec"^(2) theta is

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  12. The range of f(x)=-3 cos sqrt(3x+x+x^(2)) is

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  13. If 0 le theta le pi//2 then

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  14. Maximum value of sin x cos x is obtained at

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  15. Maximum value of cos x+ sqrt(3) sin x -2 is obtained at

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  16. Minimum value of cos x + sin x is obtained at

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  17. The graph of cot theta , pi//2 lt theta lt 3 pi//2 is discontinuous a...

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  18. The graph of tan theta , 0 lt theta lt pi is discontinuous at theta...

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  19. If sqrt(3) sin x + cos x is maximum , then x

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  20. If U=sqrt(a^(2)cos^(2) theta+ b^(2) sin^(2) theta)+ sqrt(b^(2)cos^(2) ...

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