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If 4 sin(60^(@) + theta ) sin (60^(@) -...

If ` 4 sin(60^(@) + theta ) sin (60^(@) - theta )-1=k cos 2 theta ` , the value of k is

A

1

B

2

C

3

D

`1/2`

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The correct Answer is:
B
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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-PRACTICE EXERCISE
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