Question

What is the formula for tan2A°?

Answer 1

Answer:

Step-by-step explanation:

Tan(90° -2a)

Answer 2

Answer:

$Heya\:$

Step-by-step explanation:

$Tan (A + B) = \frac{ tanA + tanB}{ 1 -tanAtanB}$

$Now, putting\:B = A\:on\:both\:sides\:of\:the\:above\:formula\:we\:get,$

$tan (A + A) =  \frac{xtanA+tanA}{1 - tanAtanA}$

$=> tan^{2} A =\frac{2tanA}{1 -tan2A}$