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Let a^r and b^bot are two vectors making angle theta with each other , unit vectors along bisector of a^r and b^bot is : |
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Answer» `pm (HATA+ hatb)/2` `|hata+hatb|^2=|hata|^2+|hatb|^2 + 2hata.hatb` 1+1+2 cos `theta` `=2(1+cos theta)` `=2xx2 cos^2 theta//2` `=4 cos^2 theta//2` SINCE `pm (hata + hatb)/(2 cos theta//2)` |
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