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( 6 sina + cosa ) / ( 3 sina - 2 cosa )
=( 6 tana + 1 ) / ( 3 tana - 2 )
=( 6 tana - 4 + 5 )/( 3 tana - 2 )
=2 + 5 /(3 tana - 2 )
=( 6 tana + 1 ) / ( 3 tana - 2 )
=( 6 tana - 4 + 5 )/( 3 tana - 2 )
=2 + 5 /(3 tana - 2 )
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