Question

use your calculator to evaluate \\( \cos ^ { - 1 } ( - 0.28 ) \\) to at least 3 decimal places. give the answer in radians.

Explanation:

Step1: Set calculator to radian mode

Ensure calculator is in radian mode.

Step2: Calculate inverse cosine

Input $\cos^{-1}(- 0.28)$ into calculator.

Answer:

$1.863$