Answers

2016-04-03T13:00:40+05:30
tan x = k tan y

  ( sin x ) / ( cos x ) = k ( sin y ) / ( cos y )

  ( sin x cos y ) / ( cos x sin y ) = k / 1

  ( sin x cos y + cos x sin y ) / ( sin x cos y - cos x sin y ) = ( k + 1 ) / ( k - 1 )

[ sin (x+y) ] / [ sin (x-y) ] = ( k + 1 ) / ( k - 1 )

( k - 1 ) sin (x+y) = ( k + 1 ) sin (x-y) ...

hope it help u
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