**Before find differential co-officiant of any mathematical term it is important to remember these formulas . These formulas are very helpful to find differential co-officiant .**

**1)**

*(d/dx)(c)=0***where**

*c*is a constant

**2)**

*(d/dx)(u+v)=(du/dx)+(dv/dx)*

**3)**

*(d/dx)(u-v)=(du/dx)-(dv/dx)*

**4)**

*(d/dx)(u.v)=(vdu/dx)+(udv/dx)*

**5)**

*(d/dx)(u/v)=[(vdu/dx)+(udv/dx)]/v.v*

**6)**

*(d/dx)(cu)=cdu/dx*

**where**

*c*is a constant .

**7)**

*dy/dx=(dy/du)(du/dx)*

**8)**

*dy/dx=1/(dx/dy)*

**9)**

*dy/dx= (dy/du)(du/dv)(dv/dx)*
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