Polar Coordinates

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Author:
tenorsextets
ID:
51211
Filename:
Polar Coordinates
Updated:
2010-11-22 19:28:16
Tags:
polar rectangular coordinates trig parametric equations
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  1. Polar to Rectangular (finding x and y)
    • (r, θ)
    • cosθ= x/r
    • sinθ= y/r
  2. Rectangular to Polar (finding r)
    • (x, y)
    • r^2= x^2 + y^2
    • tanθ= y/x
    • tan^-1(y/x)
  3. Circle:
    Line:
    Spiral:
    • r= (a number)
    • θ= (radian measure)
    • r= θ
  4. When r= cosθ or sinθ, you need to use ______ to find the points for the graph.
    table of values
  5. When graphing a polar graph, always go (which direction)?
    Counter-clockwise
  6. How do you determine the intervals in a polar graph?
    • θ= 90
    • 2θ= 45
    • 3θ= 30

    and etc...

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