🛠️ JEE➗ Maths

Let a unit vector \(\overrightarrow{O P}\) make an angle \(\alpha, \beta, \gamma\) with the positive directions of the c…

Q1

Let a unit vector \(\overrightarrow{O P}\) make an angle \(\alpha, \beta, \gamma\) with the positive directions of the co-ordinate axes \(O X, O Y, O Z\) respectively, where \(\beta \in\left(0, \frac{\pi}{2}\right)\) if \(\overrightarrow{O P}\) is perpendicular to the plane through points \((1,2,3),(2,3,4)\) and \((1,5,7)\), then which one of the following is true?

[JEE Main 2023, 30 Jan (Shift 1)]

a

\(\alpha \in\left(\frac{\pi}{2}, \pi\right)\) and \(\gamma \in\left(\frac{\pi}{2}, \pi\right)\)

b

\(\alpha \in\left(0, \frac{\pi}{2}\right)\) and \(\gamma \in\left(0, \frac{\pi}{2}\right)\)

c

\(\alpha \in\left(\frac{\pi}{2}, \pi\right)\) and \(\gamma \in\left(0, \frac{\pi}{2}\right)\)

d

\(\alpha \in\left(0, \frac{\pi}{2}\right)\) and \(\gamma \in\left(\frac{\pi}{2}, \pi\right)\)

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