Good day Dear community,
I'm really new in this field, so I truly appreciate your help and advises. I have this math problem:
Consider the two mutually perpendicular unit vectors:
$$i_a=3/5 i_1-4/5 i_2$$
$$i_b=4/5 i_1+3/5 i_2$$
Also, I have this Tensor: $$[A]=\begin{bmatrix}-2&3&1\\4&2&3\\-2&1&0\end{bmatrix}$$
I need to find the component of the tensor $A_{ab}$
Thanks ind advance for any help!