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प्रश्न
The distance of a point P(a, b, c) from x-axis is ______.
विकल्प
`sqrt(a^2 + c^2)`
`sqrt(a^2 + b^2)`
`sqrt(b^2 + c^2)`
`b^2 + c^2`
उत्तर
The distance of a point P(a, b, c) from x-axis is `sqrt(b^2 + c^2)`.
Explanation:
The required distance is the distance of P(a, b, c) from Q(a, o, o), which is `sqrt(b^2 + c^2)`.
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