Question

Choose the correct alternative:

`tan^-1 (1/4) + tan^-1 (2/9)` is equal to

Options

• `1/2 cos^-1 (3/5)`

• `1/2 sin^-1 (3/5)`

• `1/2 tan^-1 (3/5)`

• `tan^-1 (1/2)`

Answer 1

`tan^-1 (1/2)`