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**Exercise 5.1**

**Express each of the complex numbers given in the exercises 1 to 10 in the form :**

**1. **

**Ans. **Here =

= =3

**2. **

**Ans. **Here

=

**3. **

**Ans. ** =

=

**4. **

**Ans. **Here

=

**5. **

**Ans. **Here

=

**6. **

**Ans. **Here

=

=

**7. **

**Ans. **Here

=

= = =

**8. **

**Ans. **Here =

= =

=

**9. **

**Ans. **Here

=

=

=

=

=

**10. **

**Ans. **Here =

=

= =

= =

**Find the multiplicative inverse of each of the complex numbers given in the exercises 11 to 13.**

**11. **

**Ans. **Multiplicative Inverse of =

=

= =

**12. **

**Ans. **Multiplicative Inverse of =

=

= =

**13. **

**Ans. **Multiplicative Inverse of = = =

**14. Express the following expression in the form of **

**Ans. **Here

= =

= =

=

Very good