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The angle made by the vecotr vec(A)= hat...

The angle made by the vecotr `vec(A)= hat(i)+hat(j)` with x-axis is

A

`90^(@)`

B

`45^(@)`

C

`22.5^(@)`

D

`30^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`vec(A)= hat(i)+hat(j)implies|A|= sqrt(1^(2)+1^(2))= sqrt(2)`
`cos alpha= (A_(x))/(|A|)= 1/(sqrt(2))= cos 45^(@)`
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A2Z-VECTORS-Expressing Vectors In Unit Vector Notation
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  16. Find the vector that must be added to the vector hat(i)-3hat(j)+2hat(k...

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