In this research, we study the projection operator linked with
Chebyshev polynomials that has an important role in finding the
best approximation polynomials for a function on the interval.
we also use an operator as a useful method in defining b
est
approximation polynomial for Continuous Function on the
interval writhen defined condition,
The operator is used in zero points of the Chebyshev polynomials
and we proved that norm of the operator in minimum.
