Mathematics · 2021
JEE Main · 18 March 2021, Shift 2 · Q66
In a triangle A B C, if | B C |=8,| C A |=7,| A B |=10, then the projection of the vector A B on AC is equal to:
In a triangle $\displaystyle A B C$, if $\displaystyle |\overrightarrow{B C}|=8,|\overrightarrow{C A}|=7,|\overrightarrow{A B}|=10$, then the projection of the vector $\displaystyle \overrightarrow{A B}$ on $\displaystyle \overrightarrow{\mathrm{AC}}$ is equal to :
Official answer
(2)
$\displaystyle \frac{85}{14}$
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.