help with solving equations with complex values and or phasors

[itsamecameron]

(04-22-2016 08:59 AM)Nigel (UK) Wrote:  I have a couple of suggestions to make:

• I don't think you can use "j" for the square root of -1.
• I assume you are using blue-shifted "x" for the angle sign, not "<".
• Capital "I" is a Home variable and this isn't recognised by the CAS.
  

I entered, in CAS mode,

Code:


csolve(a*(50+40+i*492.418+330)-7=0,a)

where "i" is blue-shifted "2", and received a complex number in rectangular form as the answer.

CAS mode doesn't seem to have a way to display complex numbers in polar form directly (strange! I hadn't noticed this before). However, in the catalogue there is a function "polar_coordinates" which takes a complex number as argument and returns a vector containing modulus and argument. doing this with the number given by csolve correctly reproduces the solution that you give.

Nigel (UK)

Nigel this is exactly what I am looking for, the j and < where just for what I was typing here on my calc I used the shift 2 for i and the shift "multiply" for <. The csolve is giving good answers though. I have one other question, can you show me how to do it for more than one equation? would it be csolve(eqn1, eqn2, eqn3, a,b,c)? or some other way?