The left side <math><mstyle displaystyle="true"><mn>0.5</mn></mstyle></math> does not equal to the right side <math><mstyle displaystyle="true"><mn>0.70710678</mn></mstyle></math> , which means that the given statement is false.

False

Do you know how to Determine if True cos((5pi)/3)=( square root of 2)/2? If not, you can write to our math experts in our application. The best solution for your task you can find above on this page.