calc: Polar Mode

 
 7.4.2 Polar Mode
 ----------------
 
 The Calculator normally “prefers” rectangular complex numbers in the
 sense that rectangular form is used when the proper form can not be
 decided from the input.  This might happen by multiplying a rectangular
 number by a polar one, by taking the square root of a negative real
 number, or by entering ‘( 2 <SPC> 3 )’.
 
    The ‘m p’ (‘calc-polar-mode’) command toggles complex-number
 preference between rectangular and polar forms.  In Polar mode, all of
 the above example situations would produce polar complex numbers.