Let (\overline{a}, \overline{b}) denote the angle between vectors \overline{a} and \overline{b}. If \overline{a}=2 \overline{i}+3 \overline{j}+6 \overline{k}, \overline{a} \overline{b}=4 and (\overline{a}, \overline{b})=\cos ^{-1} (\frac{4}{21}), then \overline{ {\a}}+\overline{ {\b}}=

3 \overline{ {\i}}+\overline{ {\j}}+8 \overline{ {\k}}

3 \overline{ {\i}}+5 \overline{ {\j}}+4 \overline{ {\k}}

3 \overline{ {\i}}+5 \overline{ {\j}}+8 \overline{ {\k}}

\overline{ {\i}}+\overline{ {\j}}+8 \overline{ {\k}}

AP EAPCET 15th May 2023 Shift 2 Solved Paper

Section: Mathematics

Question : 32 of 160

Marks: +1, -0

Let (a,b) denote the angle between vectors a and b. If a=2i+3j+6k,ab=4 and (a,b)=cos−1(‌

), then a+b=

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