Question

Find the points on the curve xy+4=0 at which the tangents are inclined at an angle of 45 with the x axis

Answer 1

might want to start by taking a first derivative

Answer 2

it comes y+4=0

Answer 3

then?

Answer 4

its not y+4 = 0

Answer 5

oh..its the prod. rule pellet!
back to you in a minute

Answer 6

:)

Answer 7

its also good to know that slope = y/x, and tan(theta) = y/x are equivalent

tan(45) = 1, so you are looking for where f'(c) = 1

Answer 8

yea after these its coming dy/dx=-(y/x)
what do i do now?

Answer 9

ok done :D thanks mate :D :D

Answer 10

really thanks

Answer 11

youre welcome