Question

prove that 2tan^-1x=tan^-1 2x/1-x^2​

Answer 1

Answer:

Lettan

−1

x=θ

⇒tanθ=x

weknowthat

tan

2

θ=

1−tan

2

θ

2tanθ

⇒tan

2

θ=

1−x

2

2x

⇒2θ=tan

−1

(

1−x

2

2x

)

⇒2tan

−1

x=tan

−1

(

1−x

2

2x

)

Answer 2

Answer:

I hope you understand............