Question

How do you use a calculator to approximate `tan^-1(7/2)`?

Answer 1

`" "`
`color(red)(tan^(-1)(7/2)~~ 74.05^@`

Explanation:

`" "`
Calculator used: TI-84 Plus Silver Edition.

`color(green)(Step.1`

Turn the calculator ON.

`color(green)(Step.2`

Set the MODE to Degree.

`color(green)(Step.3`

Press 2ND Key and tan Key.

`color(green)(Step.4`

Type `color(red)(7/2`

`color(green)(Step.5`

The value `color(blue)(74.0546041` is displayed as the result in degree.

Alternative:

`color(green)(Step.1, Step.3 and Step.4` are the same.

`color(green)(Step.2`

Set the MODE to Radian.

`color(green)(Step.5`

The value `color(blue)(1.292496668` is displayed as the result in radian mode.

Hope you find this process useful.