Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
What is the angle which the vector $(\hat{\mathrm{i}}+\hat{\mathrm{j}}+\sqrt{2} \hat{\mathrm{k}})$ makes with the z-axis?
A. $\frac{\pi}{4}$
B. $\frac{\pi}{3}$
C. $\frac{\pi}{6}$
D. $\frac{2 \pi}{3}$
Solution:
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