Bila 2 cos (x+1/4 pi)=cos (x-1/4 pi) maka

Name: Bila 2 cos (x+1/4 pi)=cos (x-1/4 pi) maka
Uploaded: 2023-12-19T09:26:43
Duration: PT2M39.634S
Description: Bila 2 cos (x+1/4 pi)=cos (x-1/4 pi) maka