Filter noise by using average method

[MyHuong]

Lease help me, I have an assignment that ask me Filter the nois of this function
f(x)=cos(0.1t) + noise
the noise is random number between -0.5< n < 0.5
Filter the noise out using the average noise method? ( in excel )
Thanks

 

[berkeman]

Lease help me, I have an assignment that ask me Filter the nois of this function
f(x)=cos(0.1t) + noise
the noise is random number between -0.5< n < 0.5
Filter the noise out using the average noise method? ( in excel )
Thanks

We do not do your homework for you. What can you tell us about how to use DSP to perform this filtering? What kind of filter (LPF, BPF, HPF) do you think you need to set up?