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Heya!!
To find x let's calculate it's dot product.
A . B = A B Cos ©
Where © is angle between A and B
© = 90° Given.
Cos 90 = 0
______________________________
=>
A . B = 0
=>
8 + 2x + 2 = 0
=>
2x = -10
=>
x = -5
So, value of x is -5
To find x let's calculate it's dot product.
A . B = A B Cos ©
Where © is angle between A and B
© = 90° Given.
Cos 90 = 0
______________________________
=>
A . B = 0
=>
8 + 2x + 2 = 0
=>
2x = -10
=>
x = -5
So, value of x is -5
Amish4567:
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