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Define Radian....

Define Radian.

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The correct Answer is:
Radian is the angle subtended at the centre of the circle by an arc whose length is equal to the radius.
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Knowledge Check

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    A
    `(pi)/(10)rad`
    B
    `(pi)/(180)rad`
    C
    `(pi)/(18)rad`
    D
    `(18)/(pi)`

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