7.7 Reduction Formulas
We shall now establish a quick method to evaluate
![](c58.gif)
![](c54.gif)
Thus the power of sin x reduces from n to ( n - 2 ). We can continue this process till the power reduces to zero or one.
![](c55.gif)
![](c56.gif)
These formulas have been given by ’ Walli ’ Hence they are known as Walli’s reduction formulas.
![](c59.gif)
*********
|