# How do you calculate #cos^-1 (0.34)#?

##### 1 Answer

Feb 7, 2017

A calculator must be used. To put your calculator in degree mode, press the MODE button and select degree, the press the 2nd button then MODE again. For most TI calculators, press the 2nd button then press the cos button then enter the value 0.34. This will give you an answer of 70.123 (when you round to 3 decimal places).

#### Explanation:

(see answer)