Question

I need help with this question.

Answer 1

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Explanation:

Given two vectors a and b,we are rquired to find the angle between them.

a=(8,7);b=(7,0).

Angle between two vectors can be found by dot product of them.

If a and b are two vectors then the dot product of them is given by|a||b|cos(α).

Where α is the angle between the vectors a and b.

Now
`|a|=√(113)\text{ } and\text{ } |b|=√(49)`. and
`a.b=8\ times 7+7* 0` =56.

Now cosα=
`(8)/(√(113) )` so α= cosine inverse of that.

∴α=

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