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Find all the values of alpha for which t...

Find all the values of `alpha` for which the equation `sin ^(4) x+ cos^(4)x+ sin 2x +alpha=0` is valid.

A

`(-1,1)`

B

`[-(5)/(2), (3)/(2)]`

C

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

D

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

Text Solution

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The correct Answer is:
D
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