Question

If a=2i-2j-k and b=i+j then find angle between a and b

Answer 1

Answer:

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Answer 2

Given:

Vector a = 2i-2j-k

Vector b = i+j

To Find:

Angle between a and b

Solution:

A = 2i-2j-k

B = i+j

Angle = 90°

Resultant of vectors A and B will be -  

R = A+B

R = ( 2i-2j-k) + (i-j)

R = 3i-j-k

Projection of resultant on x axis -  

r = 3 / √9+1+1

r = 3/√11