Sharp EL9900C EL-9900C - Page 89

Chapter 5: Advanced Calculations - Advanced Keyboard 2 real( real(complex number) Returns the real part of a complex number (or list of complex numbers). 3 image( image(complex number) Returns the imaginary part of a complex number (or list of complex numbers). 4 abs( abs(complex number) Returns the absolute value of a complex number (or list of complex numbers). 5 arg( arg(complex number) Takes the coordinates (x + yi), and returns the θ. Calculations using complex numbers To calculate using complex numbers, select the sub-menu item 4 x ± yi or 5 r ∠ θ in the F ANSWER of the SETUP menu items. The initial screen for the complex number calculation mode is the same as for the real number mode. Complex numbers can be noted using either 4 x ± yi (rectangular coordinates) or 5 r ∠ θ (polar coordinates). 79