Practicing Success
The distance between the line $\vec{r}= 2\hat{i} - 2\hat{j} + 3\hat{k} + (\hat{i} - \hat{j} + 4\hat{k})$ and the plane $\vec{r}. (\hat{i} +5 \hat{j} + \hat{k})= 5, $ is |
$\frac{10}{3}$ $\frac{3}{10}$ $\frac{10}{3\sqrt{3}}$ $\frac{10}{9}$ |
$\frac{10}{3\sqrt{3}}$ |
Clearly, given line passes through the point $(2\hat{i} - 2\hat{j} + 3\hat{k})$ and is parallel to the given place. ∴ Distance between the line and the plane = Length of perpendicular from $2\hat{i} - 2\hat{j} + 3\hat{k}$ to the given plane. $=\frac{|(2\hat{i} - 2\hat{j} + 3\hat{k}).(\hat{i} +5\hat{j} + \hat{k})-5|}{|\hat{i} +5\hat{j} + \hat{k}|}=\frac{10}{3\sqrt{3}}$ |