Two tangents are drawn from a point ( – 4 , 3 ) to the parabola y 2 = 16 x . If α is the angle between them, then the value of cos α is

Question

Two tangents are drawn from a point ( – 4 , 3 ) to the parabola y 2 = 16 x . If α is the angle between them, then the value of cos α is, 0, 1 2, 3 2, 1 2

MARKS App · Accepted Answer

∵ ( – 4 , 3 ) lies on the directrix of y 2 = 16 x . ∴ Angle between tangents is 90 ° . ∴ c o s 90 o = 0

Search any question & find its solution

Looking for more such questions to practice?