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If m* tan ( theta - 30^(@))= n* tan( the...

If `m* tan ( theta - 30^(@))= n* tan( theta + 120^(@)), "then " cos 2 theta = `

A

`( m+n)/(2(m-n))`

B

`(m-n)/(2(m-n))`

C

`(m+n)/(2(m+n))`

D

`(m-n)/(2(m+n))`

Text Solution

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 D ( TRANSFORMATIONS )
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