Sharp EL-9900 - Manual (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 →θθθθθ( xy →θθθθθ(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 = rsinθ
5 r θθθθθ→x( r θθθθθ→x(r coordinate, θθθθθ coordinate)
Returns rectangular
coordinate X value
from r-
θ polar
coordinates.
6 r θθθθθ→y( r θθθθθ→y(r coordinate, θθθθθ coordinate)
Returns rectangular
coordinate Y value
from r- θ polar
coordinates.
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