JEE Main · 2024 · 01 Feb 2024 · Shift 2 · Vector Algebra

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Consider a where and . If the angle bisector of meets the line BC at D , then the length of the projection of the vector on the vector is:
  1. (A)✓ Correct
  2. (B)
  3. (C)
  4. (D)

Answer: (A)

Solution

.
.

Since , the triangle is isosceles at , and the internal angle bisector of meets at its midpoint (the angle-bisector theorem gives ):




Length of projection of on :

JEE Main · 2024 · 01 Feb 2024 · Shift 2 · Single correct option

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