If a unit vector a makes angles (π)/3 with i, (π)/4 with j and θ ∈ (0, π) with k, then a value of θ is

If a unit vector a makes angles (π)/3 with i, (π)/4 with j… — JEE Main 2019 Mathematics PYQ

JEE Main 2019 · 9 Apr · Shift II

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

Show answer

Correct option: D

[JEE Main 2019 · 9 Apr · Shift II]

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