Long Answer Type
forms the sides of a right-angled triangle. Also, find the remaining angles of the triangle.
Short Answer TypeIf the vertices A, B, C of ∆ ABC have position vectors (1, 2. 3), (– 1, 0, 0), (0, 1, 2) respectively, what is the magnitude of ∠ABC?
Long Answer Type
with a unit vector along the sum of vectors 
and 
is equal to 1. Find the value of λ.
makes angle 
and an acute angle 
with 
, then find the component of 
and the angle 
.
.
makes an angle 
makes an angle 
is a unit vector
∴ = 60°, 120°
Rejecting 
= 120° as ө is given to be acute,
we have 
= 160°
Now scalar components of 
are 
and vector component of 
are 
Also 
Short Answer TypeLong Answer Type
makes angles 
with 
and acute angle 
with 
, then find the components of 
and the angle 
.
form the vertices of a right angled triangle. 
form a right angled triangle.
are mutually 
Switch
Find a vector 
which is perpendicular to both 
