The angle between Radius vector r=a(1-cos )and tangent to the curve i – McqOptions

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1.	The angle between Radius vector r=a(1-cos )and tangent to the curve is given by _______
A.	= ( frac{ }{2} )
B.	=
C.	= (- frac{ }{2} )
D.	=0
Answer» B. =

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