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Question

Express the following angles into radian
10o ,40o ,30o

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Solution

Radian measure is the ratio of the length of a circular arc (a) to the radius of the arc (r). When dealing with a central angle of a unit circle, the measure of the angle (in radians) can be modelled as an arc length along the unit circle.

Let 1o=0.0174 radians
Therefore,
10o=0.1745 radians
40o=0.698 radians
30o=0.523 radians

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