can you get miter cuts using this....

yes get the angle from what ever then take a pc. of scrap draw the angle on it if your using a laser guided saw match the laser line on the scrap wood ,make the cut and match that should match the angel you needed

No, this is for making circles.

yes but you must understand the angle you measure is often an included angle. Therefore you will have to reduce that to the miter setting. It is simple Euclidean Geometry supplementary and complementary angles, trig and the right triangle. .