Sharp EL-9900 - Page 85

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