Question

Find the equations of the tangents drawn from the point (2, 3) to the ellipse, 9x² + 16y² =144.

Answer 1

 Let equation of tangent be 

Rechecking we get when m = 0 C > 0 & when m = – 1 C > 0

∴ Equation of tangent is 

y = 3 and y = – x + 5 or x + y = 5.