52°15' : What does it mean?

This type of measure came up in one of my math problems but I don't know that it means, I've never seen it before.

The subject is Trigonometry if that makes any difference.

Thanks, that really helped.

But if it were more complex like tan(37°46', how would you enter that into a calculator when 46/60 isn't a finite number.

When I tried something like 37 + (46/60), it messed up the calculations and the answer.

Is there a simpler way?