5a)
My equation was y=3sin18(x+10).
I ignored the vertical shift, which is supposed to be +4.
I also only calculated half the period. The period should be 40, making it 3sin9, instead of 18.
I also made it +10 when it should be -10.
2b)
Cos-1(sin90)
Cos-1(1)
the only time this happens is at 0 degrees because the Cos indicates only principle values. I included all values.
I am pretty good at memorizing the unit circle values and evaluating compound functions. I can also graph equations fairly well. At the time of the unit, I struggled with providing an equation given a graph. After the subsequent units working with trig equations, I am able to do this more easily.
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