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the least value of cos ^2 x + sec...

the least value of ` cos ^2 x + sec ^2 x` is

A

0

B

`-2`

C

`2`

D

`-1`

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-QUADRATIC EXPRESSIONS-EXERCISE 1B (QUADRATIC EXPRESSIONS)
  1. the greatest negative integer satifying x^2 - 4x - 77 lt 0 a...

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  2. If x gt 0 then the least value of x +1/x is

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  3. the least value of cos ^2 x + sec ^2 x is

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  4. The range of (x^2 + 2x +1)/( x^2 +2x -1) is

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  5. The range of ( x^2 - 2x +9)/( x^2 +2x + 9 ) is

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  6. The range of (x^2-2x+3)/(x^(2)-2x-8) is

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  7. The range of (x^2-2x+3)/(x^(2)-2x-8) is

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  8. IF x is real then the value of ( x ^2 - 3x +4)/( x^2 +3x +4) ...

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  9. Show that none of the values of the function (x^(2)+34x-71)/(x^(2)+2x-...

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  10. IF x is real , then ( x^2 - bc ) /( 2x -b-c) has values betw...

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  11. If x is real then y= (2x^2+6x +5)/( x^2 +3x +2) between -2 an...

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  12. If x is real, then the minimum value of y=(x^(2)-x+1)/(x^(2)+x+1) is

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  13. the ( relative ) minimum value of ( x^2 - 3x +2) /( x^2 + 3x +2...

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  14. For x in R, the least value of (x^(2)-6x+5)/(x^(2)+2x+1) is

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  15. If x in R, then the range of (x)/(x^(2)-5x + 9) is

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  16. If x is real , then the maximum value of (x^(2)+14x+9)/(x^(2)+2x+3) is

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  17. the limits of ( 6x ^2 - 18 x + 21 ) /( 6x^2 - 18 x + 17 ) ar...

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  18. If x is real, then the range of (x^(2)+2x+1)/(x^(2)+2x+7) is

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  19. IF (x-a) /( x^2- 3x +2) takens all real values for x in R , ...

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  20. IF x in R then ( x^2 + 2x + a) /( x^2 + 4x + 3a ) can take ...

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