## EXERCISE 3.4

#### Page No 78:

#### Question 1:

Find the principal and general solutions of the equation

#### Answer:

Therefore, the principal solutions are *x* =and.

Therefore, the general solution is

#### Question 2:

Find the principal and general solutions of the equation

#### Answer:

Therefore, the principal solutions are *x* =and.

Therefore, the general solution is, where *n* ∈ **Z**

#### Question 3:

Find the principal and general solutions of the equation

#### Answer:

Therefore, the principal solutions are *x* = and.

Therefore, the general solution is

#### Question 4:

Find the general solution of cosec *x* = –2

#### Answer:

_{cosec }_{x}_{ = –2}

Therefore, the principal solutions are *x* =.

Therefore, the general solution is

#### Question 5:

Find the general solution of the equation

#### Answer:

#### Question 6:

Find the general solution of the equation

#### Answer:

#### Question 7:

Find the general solution of the equation

#### Answer:

Therefore, the general solution is.

#### Question 8:

Find the general solution of the equation

#### Answer:

Therefore, the general solution is.

#### Question 9:

Find the general solution of the equation

#### Answer:

Therefore, the general solution is