Two circles of radius R and r, where the circle with radius r having a fixed point roll outside the circle with radius R along its circumference forming epicycloid. What is the equation of epicycloid in X( )?

X( ) = (R+r)cos( )+rcos( ( frac{R+r}{r} ) )

X( ) = (R+r)cos( )-rcos( ( frac{R+r}{r} ) )

X( ) = (R+r)cos( )+rcos( ( frac{R+r}{r} ) )

X( ) = (R-r)cos( )-rcos( ( frac{R+r}{r} ) )

X( ) = (R+r)cos( )-rcos( ( frac{R-r}{r} ) )

Two circles of radius R and r, where the circle with radius r having a

1.	Two circles of radius R and r, where the circle with radius r having a fixed point roll outside the circle with radius R along its circumference forming epicycloid. What is the equation of epicycloid in X( )?
A.	X( ) = (R+r)cos( )-rcos( ( frac{R+r}{r} ) <em> </em>)
B.	X( ) = (R+r)cos( )+rcos( ( frac{R+r}{r} ) <em> </em>)
C.	X( ) = (R-r)cos( )-rcos( ( frac{R+r}{r} ) <em> </em>)
D.	X( ) = (R+r)cos( )-rcos( ( frac{R-r}{r} ) <em> </em>)
Answer» B. X( ) = (R+r)cos( )+rcos( ( frac{R+r}{r} ) <em> </em>)

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Two circles of radius R and r, where the circle with radius r having a fixed point roll outside the circle with radius R along its circumference forming epicycloid. What is the equation of epicycloid in X( )?

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