Can anyone PLEASE explain axis rotation?

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    Axis Explain Rotation
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SUMMARY

The discussion focuses on the mathematical representation of a rotation transformation about the y-axis by 45 degrees. The rotation matrix is defined as follows: [ cos(45°) 0 sin(45°); 0 1 0; -sin(45°) 0 cos(45°)]. The user expresses gratitude for resources that clarify the derivation of this matrix, specifically referencing a helpful link to Kwon3D's theory on transformations.

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m0nk3y
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So I am asked to rotate by 45 degrees about the y-axis.

With the power of the net i found that it is;
[ cos(45) 0 sin (45);
0 1 0;
-sin(45) 0 cos(45)]

i really would like to understand HOW they get this.

THANKS in advance!
 
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Thank you, that helped a lot! I get finally get it now!
 

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