AutoCAD Vector v. Matlab calculations, does not match

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Stephen Moran 2019-11-20

In AutoCAD generated a vector that begins at the origin and ends at (28.14,18.11)

then rotated it 25 degrees counter clockwise holding the origin fast. The resultant

endpoint of the rotated vector being (17.85,28.30). Again this is done in AutoCAD.

In MATLAB i created theta giving it a value of (25*pi)/180, 25 degrees represented

in radians. x1 being the first vector [28.14,18.11] my rotation vector is

r1=]cos(theta), -sin(theta);sin(theta),cos(theta)]. When I multiply the r1 by x1

i don't get the desired result. That result being what is shown in AutoCAD.

refer to the screen shots below.

Simulink

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