Coordinates with respect to a basis? Suppose that a rectangular x'y' coordinate system is obtained by rotating a rectangular xy-coordinate system about the origin through the angle theta =3pi/4

Question

anonymous · Answer

Find the rotation equation that express those x'y' coordinates in terms of xy coordinates and use those equations to find the x'y' coordinates of the point whose xy coordinates are (-2,6)

anonymous · Answer

Last chapter of linear algebra and it's quite confusing..

amistre64 · Answer

x = x'cos(t) + y'sin(t)  .... i cant recall if its + or - in there at the moment

amistre64 · Answer

.... been way to long ago :)

amistre64 · Answer

http://www.stewartcalculus.com/data/CALCULUS%20Concepts%20and%20Contexts/upfiles/3c3-RotationofAxes_Stu.pdf

anonymous · Answer

Oh I see thanks!