Exercise 4.2

Exercise . . (i) , , , , , , ± ± ± ± ± − (ii) , , , ± ± . ] , ∉ . True . . (i) π (ii) (iii) π . (i) [ Exercise . . (i) [ , ] (ii)  . (i) π (ii) - p . (i) π (ii) (iii) . . (i) ∞ (ii) (iii) Exercise . . (i) π (ii) π (iii) . (i) (ii) cot ( ) (iii) Exercise . . (i) (ii) (iii) π . (i) x (ii) x (iii) . (i) π (ii) (iii) . . (i) x = (ii) ab = + (iii) x ∈ p ,  (iv) x = . Answers Exercise . ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) Exercise . . ± . ) ) . or . . . . . ± . , + = . out side, inside, outside . (i) ( , , (ii) ( , ), (iii) , ,   (iv) , ,   . q , ( , ), Exercise . . (i) (ii) (iii) ( (iv) . (i) = (ii) = (iii) (iv) = . (i) (ii) ( (iii) . Vertex Focus Equation of directrix Length of latus rectum i. , , x = − ii. , , y = − iii. , , x = iv. , , y = v. , , x = −