Y=SIN(3x-1)

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Y=SIN(3x-1)Y=SIN(3x-1)Y=SIN(3x-1)结果：y''=3COS(3*x-1)令t=3*x-1dx/dt=3则y=SIN(t)dy/dx=(dy/dt)/(dx/dt)=3*CO

Y=SIN(3x-1)
Y=SIN(3x-1)

Y=SIN(3x-1)
结果：y'=3COS(3*x-1)
令t=3*x-1 dx/dt=3则 y=SIN(t)
dy/dx=(dy/dt)/(dx/dt)
=3*COS(t)
=3*COS(3*x-1)
熟练后应该直接能观察出答案,加油!

y'=3COS(3X-1)