(tan(2tan^{-1}(\frac{2}5))) is equal to | Mathematics | SolveeIt | Solveeit

Today, August 20

Question

$tan(2tan^{-1}(\frac{2}5))$ is equal to

A

$\frac8{5}$

B

$\frac{10}{21}$

C

$\frac{20}{21}$

D

$\frac{21}{25}$

E

$\frac{4}{25}$

Answer

$\frac{20}{21}$

Explanation

Solution

The correct option is (C): $\frac{20}{21}$