Question

http://awesomescreenshot.com/0cc2e0mh28

Answer 1

"In mathematics, a periodic function is a function that repeats its values in regular intervals or periods. The most important examples are the trigonometric functions, which repeat over intervals of 2π radians."

Examples of Non-Periodic Functions: https://www.google.com/search?q=periodic+functions&client=firefox-a&hs=iWZ&rls=org.mozilla:en-US:official&channel=fflb&tbm=isch&source=lnms&sa=X&ei=OHgHU7n0LqPp2QXR_4DICg&ved=0CAgQ_AUoAg&biw=1366&bih=664#channel=fflb&q=non%20periodic%20functions&revid=1756708245&rls=org.mozilla%3Aen-US%3Aofficial&tbm=isch

Examples of Periodic Functions: https://www.google.com/search?q=periodic+functions&client=firefox-a&hs=iWZ&rls=org.mozilla:en-US:official&channel=fflb&tbm=isch&source=lnms&sa=X&ei=OHgHU7n0LqPp2QXR_4DICg&ved=0CAgQ_AUoAg&biw=1366&bih=664#imgdii=_

Try to observe the differences between the two. c;

Answer 2

I cannot help you further, unfortunately, but hopefully that helps. (>v<)

Answer 3

The more sources and examples the better lol thank you