Solve this Let a = i + 2 j + 3k and b = 3 i + j find the unit vector in the direction ofa+b?
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santhosh , 9 Years ago
Grade 12
Vectors> Solve this Let a = i + 2 j + 3k and b = 3...
1 Answers
KUNCHAM SAMPATH
Last Activity: 9 Years ago
Given a = i + 2 j + 3k and b = 3i + j
a + b = i + 2 j + 3k + 3i + j
= 4 i + 3 j + 3k
∴ The unit vector in the direction of
=± 4 i + 3 j + 3k
16 + 9 + 9
=±
a+b
|a+b|
4 i + 3 j + 3k
| 4 i + 3 j + 3k |
=±
a+b=±
4 i + 3 j + 3k
34
a + b = i + 2 j + 3k + 3i + j
= 4 i + 3 j + 3k
∴ The unit vector in the direction of
=± 4 i + 3 j + 3k
16 + 9 + 9
=±
a+b
|a+b|
4 i + 3 j + 3k
| 4 i + 3 j + 3k |
=±
a+b=±
4 i + 3 j + 3k
34
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