Youtube videos by Julie Harland are organized at http://YourMathGal.com This video shows how to graph these 4 trig functions from a Graphing Handout: y=2sinx, y=(1/2)sinx, y= - sinx, y = -2sinx. Aligned to Common Core State Standard: HSF-TF.5 .For more great math videos visit: www.youtube.com/user/videosbyjulieharland/videos