Use the even-odd properties of the trigonometric functions

Last updated: 7/20/2022

Use the even-odd properties of the trigonometric functions to find the exact value of the given expression. Do not use a calculator. cos (-60°) Select the correct choice below and fill in any answer boxes in your choice. A. cos (-60°)= (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) B. The answer is undefined.