## jaersyn 2 years ago sketch the polar equation r = 4sin(t)

1. Mathmuse

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

2. jaersyn

don't i have to find the rectangular equation for this first?

3. Mathmuse

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

4. Mathmuse
5. jaersyn

True, can you help me graph it using rectangular coordinates? Haven't gotten around using polor coordinates yet

6. jaersyn

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7. phi

you could write your rectangular equation as $x^2 + y^2 +4y =0$ now complete the square on y

8. phi

although I am not sure where your r= -4 sin $$\theta$$ came from Up top, it is r= +4 sin $$\theta$$