Sunday, May 5, 2013
BOB for graphing
This unit made sense for the most part. The idea I really struggled was what to do with the b value in relationship to the horizontal shift. This is my fault but I never truly understood if putting the b value outside the parentheses meant that you should put the true horizontal shift inside the parentheses or the value that when distributed gives you the horizontal shift. The other portions of this unit including the graphing as well as the story problems didn't seem to give me problems. Once I got the hang of it, the tangent and cotangent graphs were straightforward and seemed similar to graphing the other functions in terms of finding the period and horizintal shift. One question I had is why we didn't need to worry about the amplitude for these graphs( tan. and cot.) . If I were to clean up that one area with the b value, this unit would be one that made complete sense
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I made a decision that I thought would be helpful for most students. One less thing to worry about when graphing. That's why we didn't worry about the amplitude. In terms of the "b" value and the horizontal shift, recall the general form of a sine wave. y = k + a•sin b(x - h). The "b" value is always factored out when you want to see the actual horizontal shift. Hope that helps!
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