Finding modulus and argument of complex number (x+iy)
Draw argand diagram
Modulus=|z|= length of the line
So |z|=(x2+y2)0.5
Argument=Angle between real (x axis) and line
so arg(z)=arctan(y/x)
EF
Answered by Emma F. • Further Mathematics tutor
7552 Views
See similar Further Mathematics A Level tutorsRelated Further Mathematics A Level answers
All answers ▸find the sum of r from 0 to n of : 1/((r+1)(r+2)(r+3))
Use De Moivre's Theorem to show that if z = cos(q)+isin(q), then (z^n)+(z^-n) = 2cos(nq) and (z^n)-(z^-n)=2isin(nq).
Use de Moivre's theorem to calculate an expression for sin(5x) in terms of sin(x) only.
Evaluate ∫sin⁴(x) dx by expressing sin⁴(x) in terms of multiple angles