tan2x=2tanx/1-tanxthen find tan60o
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tan2(30) = 2tan30/1-tan30
sub tan30 =1/√3
=2× 1/√3÷1-(1/√3 ²
=2/√3/1-1/3
=2/√3/2/3
=3/√3
multiplying √3 on numerator and denominator ⇒
=3√3/3
=√3
hence tan60 =√3
sub tan30 =1/√3
=2× 1/√3÷1-(1/√3 ²
=2/√3/1-1/3
=2/√3/2/3
=3/√3
multiplying √3 on numerator and denominator ⇒
=3√3/3
=√3
hence tan60 =√3
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