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## Homework Statement

A lamina has the shape of the region in the first quadrant that is bounded by the graphs of y = sinx and y= cosx, between x = 0 and x = π/4. Find the centre of mass if the density is δ(x,y) = y.

## Homework Equations

I know all the equations for moments and center of mass but im confused about how to go about this problem. I dont know how to convert this to polar. The question is related to the lecture on polar integrals so im assuming thats what has to be done???