Let and . Then the square of the area of the triangle with adjacent sides determined by the vectors and is :
- (A)450
- (B)900
- (C)1800✓ Correct
- (D)2400
Answer: (C)
Solution
First and . Their cross product is , with magnitude . The triangle's area is half of this, , so the square of the area is .
JEE Main · 2026 · 06 Apr 2026 · Shift 2 · Single correct option