Buktikan bahwa: cos (x+y). cos(x-y) = cos^2 y-sin^2 x

Name: Buktikan bahwa: cos (x+y). cos(x-y) = cos^2 y-sin^2 x
Uploaded: 2024-03-25T01:59:08
Duration: PT2M48.704S
Description: Buktikan bahwa: cos (x+y). cos(x-y) = cos^2 y-sin^2 x