Before starting with the arc length formula in radians, let us first recall what is arc and arc length. An arc of a circle is any part of the circumference. The angle subtended by an arc at any point is the angle formed between the two line segments joining that point to the end-points of the arc. Thearc length is defined as the interspace between the two points along a section of a curve. Learn about the arc length formula in radians, i.e., when the central angle is given in terms of radians, using solved examples.
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