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sketch the polar equation r = 4sin(t)

Mathematics
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Start with your critical points. 0, pi/2, pi, 3pi/2, 2pi you should be familiar with the values of sin(t) at these points. multiply by 4 and plot the points, connect the point to obtain a rough sketch
don't i have to find the rectangular equation for this first?
you can plot it in rectangular coordinates...but since the radius is given in terms of an angle, you can plot it directly to a polar plot

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True, can you help me graph it using rectangular coordinates? Haven't gotten around using polor coordinates yet
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  • phi
you could write your rectangular equation as \[x^2 + y^2 +4y =0 \] now complete the square on y
  • phi
although I am not sure where your r= -4 sin \(\theta\) came from Up top, it is r= +4 sin \(\theta\)

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