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The minimum of cos^(2)(120^(@) + x)+ cos...

The minimum of `cos^(2)(120^(@) + x)+ cos^(2) (120^(@) -x)` is

A

`1//3`

B

`1//2`

C

`3//2`

D

`2//3`

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 G ( VARIATION IN TRIGONOMETRIC FUNCTIONS )
  1. The minimum value of cos^(2)((pi)/3-x)-cos^(2)((pi)/3+x) is

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  2. Maximum and minimum value of sin^(2)(120^(@) + theta ) + sin^(2) (120^...

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  3. The minimum of cos^(2)(120^(@) + x)+ cos^(2) (120^(@) -x) is

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  4. The maximum value of cos^(2)(pi//4-x)+(sinx-cosx)^(2) is

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  5. Minimum value of cos^(2)(pi//4+x)+(sin x-cos x)^(2) =

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  6. The minimum value of 5 cos theta + 3 cos ( theta + pi//3) + 3 is

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  7. The maximum of 5 cos x + 3 cos ( x-60^(@)) + 7 is

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  8. The minimum value of 5 cos x + 3 cos (x+pi//3) +8 is

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  9. For all values of theta , the values of 3- cos theta + cos ( theta +...

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  10. Maximum value of sin x cos (pi//4-x) is

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  11. The minimum value of cos^(3) x+ cos^(3) (120^(@) + x) + cos^(3) (120^...

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  12. ("Minimum of "(sin^(2) x+ cos^(2)x))/("Maximum of " [sin^(2) (3x//2)+c...

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

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