Could somebody explain why?

[John P]

I am in CAS and have matrix of angles (CAS is in deg, mode) and m:=[[30,60],[60,30]]. When I do sin(m3(1)) I get [1/2,sqrt(3)/2], same if I do sin([[30,60]]) and these are correct ans.,the same when I access elements individually. But, when I do sin(m) I get [[.25,.75],[.75,.25]], the ans. are squares of the correct values. The same happens in Home when I use CAS.sin(as above). If sin operates on vectors ex.[30,60] and on 1x2 matrix [[30,60]] shouldn't it also correctly operate on nxm matrices and give the right ans.

PS. cos applied as above gives even stranger answers.

Cheers