Sharp EL-9900 Operation Manual page 85

Chapter 5: Advanced Calculations — Advanced Keyboard
Rectangular to polar coordinate conversion functions
Conversion formulas: r = (x
3 xy→r( xy→r( x coordinate, y coordinate )
Returns polar
coordinate radius
value from X-Y
rectangular coordi-
nates.
4 xy→θ θ θ θ θ ( xy→θ θ θ θ θ ( x coordinate, y coordinate )
Returns polar
coordinate θ value
from X-Y rectangular
coordinates.
The following ranges
are used to find θ.
Polar to rectangular coordinate conversion functions
Conversion formulas: x = rcos θ , y = rsin θ
5 rθ θ θ θ θ →x( rθ θ θ θ θ →x( r coordinate, θ θ θ θ θ coordinate )
Returns rectangular
coordinate X value
from r-θ polar
coordinates.
rθ θ θ θ θ →y( r coordinate, θ θ θ θ θ coordinate )
6 rθ θ θ θ θ →y(
Returns rectangular
coordinate Y value
from r-θ polar
coordinates.
, θ = tan
+
2 2 1/2
y )
Degree mode: 0 ≤ |θ| ≤ 180
Radian mode: 0 ≤ |θ| ≤ π
Gradient mode: 0 ≤ |θ| ≤ 200
-1
(y/x)
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