The gs of the equation tan7x-tan3x-tan4x=tan3x tan4x tan7x

Answers (1)

Solution: We have, \ (3x+4x)=7x

Taking tan both side we get , 

\Rightarrow tan (3x+4x)=tan(7x)\ \Rightarrow (tan3x+tan4x)/(1-tan3x	imes tan4x)=tan7x\ \Rightarrow tan3x+tan4x=tan7x-tan3x	imes tan4x	imes tan7x

\ Rightarrow tan7x-tan4x-tan3x=tan3x	imes tan4x	imes tan7x

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