Buktikan (cos a)^4-(sin a)^4=1-2(sin a)^2.

Name: Buktikan (cos a)^4-(sin a)^4=1-2(sin a)^2.
Uploaded: 2024-04-21T13:26:43
Duration: PT2M38.9637S
Description: Buktikan (cos a)^4-(sin a)^4=1-2(sin a)^2.