William W. answered • 08/28/21
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The cosine function starts high, goes low, returns back to high between zero and 2 pi. Like this:
You can see the zeros are π/2 and 3π/2 (halfway between zero and π and then again halfway between π and 2π)
You can also consider the unit circle with cos(θ) equivalent to the x-value. In moving around the unit circle, you find that x = 0 at π/2 and at 3π/2
William W.
Hi Mark. I've found that the memory size restrictions in Wyzant prevent me from pasting in almost anything "normal". So, I draw the simplistic pictures in PowerPoint and then paste them into Wyzant. If it's complicated and I want to be careful, I graph in desmos then snapshot a picture, paste it into PowerPoint then trace a simplistic version in PowerPoint. This is REALLY lame that I can't just cut and paste a picture into Wyzant especially since I can record a video which would use mB of data but can't paste a picture in to clarify an answer. I've complained several times but got nothing in response. Please note that I was actually surprised the picture above was allowed without having to shrink it down in size. The memory restrictions are significant.
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08/28/21
Mark M.
What software do you use to draw the graph? Do you then paste it into PowerPoint then to WyzAnt? Thank you for your kind attention.08/28/21