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Can anyone please explain the derivation of the formula tan2a=2tana/1-tan^2a |
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Answer» 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 As you know tan (A+B) = (tanA+tanB)÷(1-tanAtanB)You get the formula |
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