What will be the projection of vector A → = i ^ + j ^ + k ^ on vector B → = i ^ + j ^   ?

1. $\sqrt{2}(\hat{\mathrm{i}}+\hat{\mathrm{j}}+\hat{\mathrm{k}})$
2. $2\left(\hat{\mathrm{i}}+\hat{\mathrm{j}}+\hat{\mathrm{k}}\right)$
3. $\sqrt{2}(\hat{\mathrm{i}}+\hat{\mathrm{j}})$
4. $(\hat{\mathrm{i}}+\hat{\mathrm{j}})$

Solution

Asked in: JEE Main 2021 (22 Jul Shift 1)

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