vectors-m

Related Questions

• If a, b, c are mutually perpendicular unit vectors, then $|\mathbf{a}+\mathbf{b}+\mathbf{c}|\,\,=$

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• If $\vec{a}$ and $\vec{b}$ are two non-zero and non-collinear vectors, then $\vec{a} + \vec{b}$ and $\vec{a} – \vec{b}$ are

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• If $|\mathbf{a}|\,=2,\,\,|\mathbf{b}|\,=3$ and a, b are mutually perpendicular, then the area of the triangle whose vertices are $\mathbf{0},\,\,\mathbf{a}+\mathbf{b},\,\,\mathbf{a}-\mathbf{b}$ is

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• A vector whose modulus is $\sqrt{51}$ and makes the same angle with $\mathbf{a}=\frac{\mathbf{i}-2\mathbf{j}+2\mathbf{k}}{3},\,\,\mathbf{b}=\frac{-\,4\mathbf{i}-3\mathbf{k}}{5}$ and $\mathbf{c}=\mathbf{j},$ will be

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• ABCDE is a pentagon. Forces $\overrightarrow{AB},\,\overrightarrow{AE},\,\overrightarrow{DC},\,\overrightarrow{ED}$ act at a point. Which force should be added to this system to make the resultant ${{\cos }^{-1}}\frac{4}{5}$

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