Q21 of 138 Page 24

Find the angles of a triangle whose vertices are A(0, -1, -2), B(3, 1, 4) and C(5, 7, 1).

Given Data:














Now the angle A









Now the angle B









Now the sum of angles of a triangle is π


∴ A + B + C = π




∴


More from this chapter

All 138 →
19

Show that the vectors form a right angled triangle.

 20

If and are such that is perpendicular to then find the value of λ.

 22

Find the magnitude of two vectors and having the same magnitude and such that the angle between them is 60o and their scalar product is 1/2.

 23

Show that the points whose position vectors are form a right triangle.