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cos^(2) (60^(@) - x) + cos^(2) (60^(@) +...

`cos^(2) (60^(@) - x) + cos^(2) (60^(@) +x) in`

A

`[-(1)/(2), (1)/(2)]`

B

`[(1)/(2), 1]`

C

`[(1)/(2), (3)/(2)]`

D

`[(3)/(2), 2]`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-PERIODICITY AND EXTREME VALUES-Practice Sheet (Exericise-I) Level-II (Straight Objective Type Questions)
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  8. 3 sin^(2) x -4 cos^(2) x in

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  9. The maximum value of cos x ((cos x )/( 1- sin x) + (1- sin x)/( cos x)...

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  14. cos^(2) (60^(@) - x) + cos^(2) (60^(@) +x) in

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  16. The least value of cos^(2) theta - 6 sin theta.cos theta+ 3 sin^(2) th...

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  17. The minimum value of Sinx ((1-cos x)/(sin x) + (sin x)/( 1-cos x)) ...

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  18. If f(x) = 2+ cos^(2) x + sec^(2) x, its value always is

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  19. A + B = 90^(@) rArr cos A - cos B in

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