In the calculations of the moment of inertia of the area about an inclined axis, we have some transformation done. They are:
(a) u = xcosθ + ysinθ
(b) u = xcosθ – ysinθ
(c) u = ycosθ + xsinθ
(d) u = ycosθ – xsinθ
This question was posed to me in an online interview.
My question is from Moments of Inertia for an Area About Inclined Axis in division Moments of Inertia of Engineering Mechanics