two vectors equal have resultant equal to either find the angle between them
Asked by choudharypriya65490
| 8th Sep, 2020,
12:26: AM
Expert Answer:
Let 
be the angle between the two vectors A and B such that, |A| = |B|.
Therefore,
R2 = A2 + B2 + 2AB cos
=> A2 = A2 + A2 + 2(A)(A) cos [since, |A| = |B| = |R|]
=> A2 = 2A2 + 2A2 cos
=> cos = -1/2
=> = 120°
Let be the angle between the two vectors A and B such that, |A| = |B|.
Therefore,
R2 = A2 + B2 + 2AB cos
=> A2 = A2 + A2 + 2(A)(A) cos [since, |A| = |B| = |R|]
=> A2 = 2A2 + 2A2 cos
=> cos = -1/2
=> = 120°
Answered by Shiwani Sawant
| 8th Sep, 2020,
10:52: AM
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