Question

If ABCD is a parallelogram, vector AB = 2i + 4j - 5k and vector AD = i + 2j + 3k, then the unit vector in the direction of BD is

• A. $\frac{1}{√69}(\hat{i}+2\hat{j}-8\hat{k})$
• B. $\frac{1}{69}(\hat{i}+2\hat{j}-8\hat{k})$
• C. $\frac{1}{√69}(\hat{-i}-2\hat{j}+8\hat{k})$
• D. $\frac{1}{69}(\hat{-i}-2\hat{j}+8\hat{k})$

Answer 1

Answer: (C)

$\frac{1}{√69}(\hat{-i}-2\hat{j}+8\hat{k})$

Answer 2

The correct answer is option C) $\frac{1}{√69}(\hat{-i}-2\hat{j}+8\hat{k})$