Question

find angle between x axis and A-B if A=2i+2j-k and B=6i-3j+2k​

Answer 1

Answer:

Explanation:

There are two methods to solve this questions

one by using Dot products and the other by using Cross product.

We use Dot product as it is easier one.

à . B = A B Cos ( # )

Where # is angle between A and B

A.B = 12 -6 -2

A.B = 4 A = √(9). B =. √(49)

So,. 4 = 3 × 7 Cos(#)

4 / 21 = Cos (#)

# = Cos^-1 (4 /21)

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