Tunjukkan bahwa: cos 20+cos 40+cos 60+...+cos 160+cos

Name: Tunjukkan bahwa: cos 20+cos 40+cos 60+...+cos 160+cos
Uploaded: 2024-02-27T21:57:00
Duration: PT3M49.1S
Description: Tunjukkan bahwa: cos 20+cos 40+cos 60+...+cos 160+cos 180=-1