The point ( − 3 2, 5 π 4 ) ( − 3 2, 5 π 4 ) indicates a move further counterclockwise by π, π, which is directly opposite π 4. For example, the points ( − 3 2, 5 π 4 ) ( − 3 2, 5 π 4 ) and ( 3 2, − 7 π 4 ) ( 3 2, − 7 π 4 ) will coincide with the original solution of ( 3 2, π 4 ). There are other sets of polar coordinates that will be the same as our first solution. This point is plotted on the grid in Figure 2. ![]() For example, to plot the point ( 2, π 4 ), ( 2, π 4 ), we would move π 4 π 4 units in the counterclockwise direction and then a length of 2 from the pole. ![]() Even though we measure θ θ first and then r, r, the polar point is written with the r-coordinate first. We move counterclockwise from the polar axis by an angle of θ, θ, and measure a directed line segment the length of r r in the direction of θ. The angle θ, θ, measured in radians, indicates the direction of r. The first coordinate r r is the radius or length of the directed line segment from the pole. The polar grid is scaled as the unit circle with the positive x-axis now viewed as the polar axis and the origin as the pole. The polar grid is represented as a series of concentric circles radiating out from the pole, or the origin of the coordinate plane. In this section, we introduce to polar coordinates, which are points labeled ( r, θ ) ( r, θ ) and plotted on a polar grid. However, there are other ways of writing a coordinate pair and other types of grid systems. When we think about plotting points in the plane, we usually think of rectangular coordinates ( x, y ) ( x, y ) in the Cartesian coordinate plane. Discover the full potential of the GeoGebra Graphing Calculator by exploring our official tutorial, complete with step-by-step instructions to guide you through its features and functionalities.Figure 1 Plotting Points Using Polar Coordinates These components work together to create a dynamic and engaging environment for learning and exploring math concepts using the Graphing Calculator. Table View: Generates a table of values for functions, allowing you to observe and analyze numerical relationships between variables. ![]()
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