Question

tan inverse into 1 + X by 1 - x is equal to pi by 4 + tan inverse X prove it​

Answer 1

Answer:

We can write

1+x/1-x as tan¶/4+x/1-tan¶/4x

Then by formulae

Tan inverse (a+b) =tan inverse(a+b/1-ab)

We can prove it

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