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If tan(A+B)=m , tan (A-B)=n, " then " t...

If ` tan(A+B)=m , tan (A-B)=n, " then " tan 2A= `

A

`(m+n)/(1-mn)`

B

`(m-n)/(1-mn)`

C

`(m+n)/(1+mn)`

D

`(m-n)/(1+mn)`

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A
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