Question

Prove that RADIAN is a CONSTANT angle ​

Answer 1

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Radian is a Constant Angle. Here we will discuss about radian is a constant angle. Let O be the centre of a circle and radius OR = r. If we take an arc AB = OA = r, then by definition, ∠AOB =1 radian.

Answer 2

$\textbf{Answer is in Attachment !}$