If (\theta) is angle between the lines (\frac{x}{1}=\frac{y+... | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

If $\theta$ is angle between the lines $\frac{x}{1}=\frac{y+1}{2}=\frac{z-1}{3}$ and $\frac{x+1}{3}=\frac{y}{2}=\frac{z}{1}$ , then $\cos\theta=$

A

$\frac{5}{9}$

B

$\frac{5}{8}$

C

$\frac{5}{6}$

D

$\frac{5}{7}$

E

$\frac{6}{7}$

Answer

$\frac{5}{7}$

Explanation

Solution

The correct option is (D) : $\frac{5}{7}$