This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Depends on what the units of 56 are. The API JavaDocs clearly state that the arguments for the trigonometric functions are angles in radians. (Please bookmark the above link for your future reference -- you'll learn a lot more, a lot faster by trying to look things up yourself) Junilu