# If the coordinates of the points A,B,C be (-1,3,2),(2,3,5) and (3,5,-2) respectively, then angle A=

N

As we discussed in concept

Ange between two lines in terms of direction cosines and direction ratios -

If two lines having direction ratios a1,b1,c1 and a2,b2,c2 then the angle between them is given by

If two lines have direction ratios as l1,m1,n1 and l2,m2,n2 then the angle betwee them is given by

Direction ratio of AB = (3,0,3)

Direction ratio of AC = (4,2,-4)

So, Cos A =

= 0

### Preparation Products

##### JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
##### Knockout JEE Main April 2021 (Subscription)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
##### Knockout JEE Main April 2021

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 22999/- ₹ 14999/-
##### Knockout JEE Main April 2022

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 34999/- ₹ 24999/-