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प्रश्न
Choose the correct alternative:
The value of θ ∈ `(0, pi/2)` for which the vectors `"a" = (sin theta)hat"i" = (cos theta)hat"j"` and `vec"b" = hat"i" - sqrt(3)hat"j" + 2hat"k"` are perpendicular, equaal to
विकल्प
`pi/3`
`pi/6`
`pi/4`
`pi/2`
उत्तर
`pi/3`
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