prove tan 48° tan 23°.tan42°tan67°=1
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taking lhs
=tan48*tan23*tan42*tan67*
=tan48*tan23*tan(90-48)tan(90-23)
=tan48*tan23*cot48*cot23*
=tan48*tan23*/tan48*tan23*
=1 = rhs
:)hope the ans would help u..
=tan48*tan23*tan42*tan67*
=tan48*tan23*tan(90-48)tan(90-23)
=tan48*tan23*cot48*cot23*
=tan48*tan23*/tan48*tan23*
=1 = rhs
:)hope the ans would help u..
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