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If 3(cos 2 phi - cos 2 theta) = 1 - cos ...

`If 3(cos 2 phi - cos 2 theta) = 1 - cos 2theta cos 2 phi "and" tan theta = k tan phi," then the value of K will be"`

A

`sqrt2`

B

`1/sqrt2`

C

`-1/sqrt2`

D

`-sqrt2`

Text Solution

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The correct Answer is:
A, D
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