SOLUTION: The solution set for the equation {{{ Cos (theta) = -sqrt(2)/2 }}} is (135, 225 deg), use this to solve {{{ Cos (theta/2) = -sqrt(2)/2 }}} over the interval of (0,360)

Algebra ->  Trigonometry-basics -> SOLUTION: The solution set for the equation {{{ Cos (theta) = -sqrt(2)/2 }}} is (135, 225 deg), use this to solve {{{ Cos (theta/2) = -sqrt(2)/2 }}} over the interval of (0,360)      Log On


   

Question 1113422: The solution set for the equation +Cos+%28theta%29+=+-sqrt%282%29%2F2+ is (135, 225 deg), use this to solve +Cos+%28theta%2F2%29+=+-sqrt%282%29%2F2+ over the interval of (0,360)
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If then .

and .

but .

Therefore for

John

My calculator said it, I believe it, that settles it