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Can anyone please explain the derivation …

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Can anyone please explain the derivation of the formula tan2a=2tana/1-tan^2a
  • 2 answers

Nishant Kaushik 5 years, 7 months ago

ATQ NCERT book,tan(A+B)=tanA+tanB÷1-tanA.tanB. Now we put B=A We get, tan(A+A)=tanA+tanA÷1-tanA.tanA Therefore, tan2A=2tanA÷1-tan^2A

D Sharath 5 years, 7 months ago

As you know tan (A+B) = (tanA+tanB)÷(1-tanAtanB) You get the formula
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