Establish the following inequalities geometrically or otherwise ,  ` (a) ` | vec A + vec B| -lt |
Channel: Doubtnut
Date: 2020-07-26

Establish the following inequalities geometrically or otherwise ,  ` (a) ` | vec A + vec B| -lt | vec A | + |vec B|` ,  ` | vec A + vec B| gt- ||vec A- | vec B||`  (C )` | vec A- vec B| -lt | vec A| + vec B|`  (d) | vec A- vec B| gt- || vec A| - | vec B||`  When does the equality sign above aplly ?