Question

Use your calculator or the trigonometric table to find cos -1(0.05). Give the angle measure to the nearest degree.

Answer 1

Inverse cosine is the same as arccos. Find a button on the calculator that reads either arccos or cos^(-1) and input 0.05, it should return an angle. Make sure you are in degree mode.

Answer 2

try it here : http://www.rapidtables.com/calc/math/Arccos_Calculator.htm