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Section 6: Functions 94
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To convert form polar (r, θ) coordinates to rectangular x, y coordinates:
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1.
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Key in the the value for the angle.
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2.
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Press ENTER .
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3.
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Key in the the value for the magnitude r.
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4.
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Execute P–R (polar to rectangular).
The x-coordinate is placed in the X-register and the y-coordinate is
placed in the Y-register. To display the y-coordinate value, press
X Y .
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When you execute the P–R function, the stack
contents are changed...
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...from this...
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...to this.
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P–R
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After you execute R–P or
P–R , you can press
X Y to place the calculated angle
θ or the calculated y-coordinate into the X-register for viewing or
further calculation.
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For example, convert rectangular coordinates (4,3) to polar form with the angle
expressed in radians.
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