R S Aggarwal Solutions for Exercise 1: EXERCISE 1

$i^{326}=?$

$\left(-1-i\right)$, when expressed in polar form, is 

$\left(-1-\sqrt{3}i\right)$, when expressed in polar form, is 

$\left(1-i\right)$, when expressed in polar form, is 

$\frac{\left(5-i\right)}{\left(2-3i\right)}$, when expressed in polar form, is 

$\frac{\left(1-3i\right)}{\left(1+2i\right)}$, when expressed in polar form, is 

$\left(-4+4\sqrt{3}i\right)$, when expressed in polar form, is 

$\left(\sin 30°+i\cos 30°\right)$, when expressed in polar form, is