Question

If AB = AB, find the angle between A and B​

Answer 1

Answer:

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Answer 2

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A . B = A×B

MOD ON BOTH SIDES

| A . B | = | A × B |

|A| |B| COS O = |A| |B| SIN O

SIN O = COS O

SIN O / COS O = 1

TAN O = 1

O = 45°