4. Simplify the expression -22f+8f-15+9
2 answers:
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Answer:
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Step-by-step 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 . and
=56.
Now cosα= so α= cosine inverse of that.
∴α=
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