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| 1. |
If A+B=C,|A|=|B|=|C|,then the angle between A,B |
| Answer» LET |A| = | B| = |C| = X. Vector ADDITION : A+B = C so |C|² =|A|² + |B|² + 2 |A| * | B| * cos Ф x² = x² + x² + 2 x² cosФ | |