Question

How do you evaluate `tan^-1 (4/3)` on the Scientific Calculator?

Answer 1

`53^@13`

Explanation:

Calculator -->
`tan x = 4/3` --> arc `x = 53^@13`
Answers for `(0, 2pi)`
`x = 53^@13`, and
`x = 50.13 + 180 = 233^@13`