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JEE MAIN 2019
09-04-2019 S2
Question
If a unit vector $\vec{a}$ makes angles $\frac{\pi}{3}$ with $\hat{i}, \frac{\pi}{4}$ with $\hat{j}$ and $\theta \in(0, \pi)$ with $\hat{k}$, then a value of $\theta$ is :
Select the correct option:
A
$\frac{5 \pi}{12}$
B
$\frac{2 \pi}{3}$
C
$\frac{\pi}{4}$
D
$\frac{5 \pi}{6}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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