Representing complex numbers

• 1

• 2

• 4

• 8

The modulus of a complex number is:

• the distance of the complex number from the origin

• the angle measured anticlockwise from the horizontal axis

• the remainder after dividing by a factor

• the polar form of a complex number

Let w= -√3/2 + 1/2 i calculate the modulus and argument.

• 3, 120^o
• 5, 270^o
• 1, 150^o
• Not Possible

Modulus of complex number  $1\ +\ i\ =$  

•  $1$  

•  $0$  

•  $2$  

•  $\sqrt{2}$  

• 6.33

• 9.49

• 12.49

• 3.33

For the number 3+4i the argument measured in degrees would be

• between 0 and 90°

• between 0 and -90°

• between 90° and 180°

• between -90° and -180°

Calculate the modulus and argument.

• $3,\ \frac{2}{3}\pi$

• $5,\ \frac{3}{2}\pi$

• $1,\ \frac{5}{6}\pi$

• none of the above

Calculate the value of modulus for  $-4+3i$  

•  $-5$  

•  $5$  

•  $5i$  

•  $-5i$