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Let S be the set of all alpha in R such...

Let S be the set of all `alpha in R` such that the equation, `cos 2x + alpha sin x = 2alpha -7` has a solution. The S, is equal to

A

`[2,6]`

B

[3,7]

C

R

D

[1/4]

Text Solution

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The correct Answer is:
A
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