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I like mathematics and pretty much every mathematical subject, but if there is one thing I thoroughly dislike, it is drawing (functions, waves, diagrams, etc.) We have this important trig test coming up and I need to master the drawing of sine and cosine waves. Can you guys give me an action plan of how to draw (co)sine waves? Like what to do first, second and so on. I missed a month of school because of my pneumonia so I really need all the help I can get (outside of school).

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    The values at multiples of $\frac {\pi}2$ should be enough as [illustrated here](http://www.regentsprep.org/Regents/math/algtrig/ATT7/sincostan.htm)2012-09-15

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