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
7572 Views
See similar Further Mathematics A Level tutorsRelated Further Mathematics A Level answers
All answers ▸Using mathematical induction, prove that n^3+2n is divisible by 3 for all integers n
Explain the process of using de Moivre's Theorem to find a trigonometric identity. For example, express tan(3x) in terms of sin(x) and cos(x).
If the complex number z = 5 + 4i, work out 1/z.
Show that the square of any odd integer is of the form (8k+1)