Question 198230: OK..well, im working on a lesson of where I am learning how to graph sin, and cos by finding the amplitude, period, x-intercepts, and phase shift. can you help me undersrtand what they mean by graphing it because i don't really know how to...example: y= -3cos(x+pi/4)
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! OK..well, im working on a lesson of where I am learning how to graph sin, and cos by finding the amplitude, period, x-intercepts, and phase shift. can you help me undersrtand what they mean by graphing it because i don't really know how to...example: y= -3cos(x+pi/4)
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To graph that, or any function, make a table of points.
Pick values of x and solve for y. Each pair is a point.
Use Excel or something similar to speed things up.
Plots the points on graph paper, or a grid of some sort.
Connect the points with a line. The more points you have, the smoother the curve will be.
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Option 2: get the FREE software from www.padowan.dk.com/graph/
It will do all that for you.
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