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 
.
Short Answer TypeLong Answer Type
 form the vertices of a right angled triangle. 
 form a right angled triangle.
 are mutually 
 makes angles 
 with 
  
 and acute angle 
 with 
, then find the components of 
 and the angle 
.
 makes an angle 
 with 
 makes an angle 
 is a unit vector
 is the angle between 
Switch
 Find a vector 
 which is perpendicular to both 
