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The equation "sin"^(6) x + "cos"^(6) x =...

The equation `"sin"^(6) x + "cos"^(6) x = lambda`, has a solution if

A

`(-oo, (1)/(4)) uu (1,oo)`

B

`[(1)/(4),1]`

C

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

D

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

Text Solution

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The correct Answer is:
B
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