Buktikan identitas berikut. cos(a+b).cos(a-b)+1 =

Name: Buktikan identitas berikut. cos(a+b).cos(a-b)+1 =
Uploaded: 2024-05-25T11:42:00
Duration: PT2M20.9683S
Description: Buktikan identitas berikut. cos(a+b).cos(a-b)+1 = cos^2(a)+cos^2(b)