sin(t
y= sin(t)µÄµ¥µ÷Çø¼ä
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x=tan(t) sin(t) - cos(t)=?
ÄãºÃ!ÒòΪtan(t)=sin(t)/cos(t)ËùÒÔtan(t)sin(t)=sin2(t)/cos(t)ËùÒÔx=sin2(t)/cos(t) - cos2(t)/cos(t)=(sin2(t)-cos2(t))/cos(t)=(1-2...
Çó¾í»ýs(t)=sin(t)u(t)*u(t - 1)
s(t)=sin(t)u(t)*u(t-1)=¡Ò(-¡Þ¡ú+¡Þ)sin(x)u(x)u(t-1-x)dx=¡Ò(-¡Þ¡ú+¡Þ)sin(x)u(x)u(t-1-x)dx=¡Ò(0¡út-1)sin(x)dx (t>1)=-cos(t...
x=sint,y=sin (2t)±íʾʲôÑùµÄÇúÏß?
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