1.

4. If IĀ+BI=1Ā 1=1B | then angle between Aand B will be(1) 90°(2) 120°(3) 0°(4) 60°​

Answer»

√ A² + A² + 2A²Cos THETHA = A

2A² + 2A²Cos thetha = A²

2A²Cos thetha = - A²

Cos thetha = - 1/2

Thetha = 120 Degrees

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