Question

A→×B→=12AB, what is the angle between A and B?

• A. (A) Zero
• B. (B) 30∘
• C. (C) 60∘
• D. (D) 90∘

Answer 1

Answer: (C)

(C) 60∘

Answer 2

Explanation:
Using Dot Product principle: A×B=ABcos⁡($)Here,$, means the angle between vector A and BAngle of arbitrary vectors A,B, is defined in range (0∘,180∘)Then, factor AB dissolved on both sides of equation. We will get cos⁡($)=12Finally referring to the above range, you can get only one answer:60∘Hence, the correct option is (C).