339✲✻✲■✒✻yO−→v′✠θ−→vQ(x′,y′)P(x,y)−→u′−→ux■θ3.3P(x,y)Q(x′,y′)2−→u=(x0),−→v=(0y)θ−→u′=(xcosθxsinθ),−→v′=(−ysinθycosθ)−−→OQ=−→u′+−→v′.∴−−→OQ=(xcosθ−ysinθxsinθ+ycosθ).∴⎧⎪⎪⎪⎨⎪⎪⎪⎩x′=xcosθ−ysinθy′=xsinθ+ycosθ.R(θ)=⎛⎜⎜⎜⎜⎝cosθ−sinθsinθcosθ⎞⎟⎟⎟⎟⎠⎛⎜⎜⎜⎜⎝x′y′⎞⎟⎟⎟⎟⎠=⎛⎜⎜⎜⎜⎝cosθ−sinθsinθcosθ⎞⎟⎟⎟⎟⎠⎛⎜⎜⎜⎜⎝xy⎞⎟⎟⎟⎟⎠.260◦(x,y)(x′,y′)xyx′y′Allrightsreserved,OkadomeLab.
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