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Converting between polar and Cartesian coordinates, Cartesian to polar, ¥è

ÀÛ¼ºÀÚ Uploader : ezmath ÀÛ¼ºÀÏ Upload Date: 2017-03-15º¯°æÀÏ Update Date: 2017-03-15Á¶È¸¼ö View : 532

The polar coordinates r and ¥è can be converted to the Cartesian coordinates x and y by using the trigonometric functions sine and cosine:

x = r cos ¥è
y = r sin ¥è

The Cartesian coordinates x and y can be converted to polar coordinates r and ¥è with r ¡Ã 0 and ¥è in the interval (−¥ð, ¥ð) by

r = ( x^2 + y^2 )^(1/2)
¥è = atan (y/x)
atan : arctangent

*** Âü°í¹®Çå[References] ***

https://en.wikipedia.org/wiki/Polar_coordinate_system
¥è = arctan(y/x)
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