The following scientific calculator has been used: Casio fx-3800P.
Example 1
Obtain the values of θ and r when the point P is shown as x=4 and y=3 (z=4+j3) in the rectangular co-ordinates.
- “DEG” (MODE IV)
- x “SHIFT” “
” y =, we find r=5
- “SHIFT” “
“, we find θ=36.86 degrees
Example 2
Obtain the values of θ and r when the point P is shown as x=-10 and y=20 (z=-10+j20) in the rectangular co-ordinates.
- “DEG” (MODE IV)
- x “SHIFT” “
” y =, we find r=22.36
- “SHIFT” “
“, we find θ=116.56