# Polar equation problem

1. May 21, 2010

### mk200789

1. The problem statement, all variables and given/known data
let r = sin(t)+ cos(t)
sketch the graph

2. Relevant equations

3. The attempt at a solution

i really don't know how to start this off.
i know some working should be done in order to sketch it but what?

2. May 21, 2010

### hgfalling

If you were sketching a graph in the Cartesian plane (x,y), how would you do it? You'd pick some x points, calculate the y value, and plot the points, and then infer the shape of the curve from that.

It's no different here. Let t take on a number of values in its domain, and calculate r. Then plot those points in polar coordinates.

3. May 21, 2010

### mk200789

really? ohkay~

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