已知:OC=AC=BC=1,M=a、=0t 求:x=x(),y=y(以)。 加速度 a,=v,=x=-(0+a)a cost a,=i,=j=(-a如3smar C +a2=v(+a o cos2ot+(1-a2osin2at y 0v12+42+2alcos 2at tacos at cOS(a,1)=一= a +a+2al cos 2ot a)sin t cos(, j) a l+a+2al cos s 2at加速度 a v x (l a) t x x cos 2 = = = − + a v y (l a) t y y sin 2 = = = − − a a a (l a) t l a t x y 2 2 2 4 2 2 4 2 = + = + cos + ( − ) sin l a 2al cos2t 2 2 = + + 2 2 ( )cos cos( , ) 2 cos 2 y a l a t a i a l a al t + = = − + + 求:x=x(t), y=y(t)。 已知: OC = AC = BC = l,MC = a, =t 2 2 ( )sin cos( , ) 2 cos 2 x a l a t a j a l a al t − = = − + +