If D is the degree of the curve of radius R, the exact length of its s – McqOptions

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1.	If D is the degree of the curve of radius R, the exact length of its specified chord, is
A.	radius of the curve x sine of half the degree
B.	diameter of the curve x sine of half the degree
C.	diameter of the curve x cosine of half the degree
D.	diameter of the curve x tangent of half the degree.
Answer» C. diameter of the curve x cosine of half the degree

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