Inclined inertia

Score: 4 Points

Here is a solid homogeneous disk of Radius $R$ and mass $M$. The axis goes through the center of mass of the disk and makes an angle of $60$ degree with the plane of the surface. The moment of inertia of the disk with respect to the axis is of the form of $\frac{a}{b}MR^2$. What's the value of (a+b)?



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First Solve @135792468

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