They might do the job but theyre not Mitre saw blades. Mitre saw blades have a negative rake angle on them so as the blade cuts down into the wood it able pushes it down and back. Those blade will technically lift the workpiece being cut. Not a problem if you're careful but not ideal.
https://www.woodmagazine.com/tool-reviews/mitersaws/can-i-use-a-table-saw-blade-in-my-miter-saw for more info.
