Question

Angles made by the lines represented by the equation $xy + y = 0$with $y -$axis are

• A. $0^{o}$and $90^{o}$
• B. $0^{o}$and $30^{o}$
• C. $30^{o}$and $60^{o}$
• D. $30^{o}$and $90^{o}$

Answer 1

Answer: (A)

$0^{o}$and $90^{o}$

Answer 2

Here the lines are $x = - 1$and $y = 0$ represented by $xy + y = 0$

Obviously line $y = 0$makes an angle of 90° with y-axis and x = –1 make an angle of 0° with y-axis.