SOLUTION: What is the exact value of the function cos(11pi/4)?

Algebra ->  Trigonometry-basics -> SOLUTION: What is the exact value of the function cos(11pi/4)?      Log On


   

Question 311217: What is the exact value of the function cos(11pi/4)?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
cos(11pi/4) = cos(3pi/4) = -sqrt(2) / 2