New to Mathematica, 10.1, following the guide, but getting wrong results. I'm trying to input a vector after being transformed by a rotation matrix, as:
m1={{a Cos Theta + b Sin Theta},{-a Sin Theta + b Cos Theta}}
but I get a row of 4 numbers as output? I'm trying to get a visualization of this vector so I can compare it with, for example:
m1={{a Cos Theta - b Sin Theta},{a Sin Theta + b Cos Theta}}
and a few other variations. So please give me the exact input I should be typing? Much appreciated, Alan
