Buktikan: 2 sin(pi/4+alpha)sin(3pi/4+alpha)=cos 2alpha

Name: Buktikan: 2 sin(pi/4+alpha)sin(3pi/4+alpha)=cos 2alpha
Uploaded: 2024-04-27T04:17:00
Duration: PT2M25.4962S
Description: Buktikan: 2 sin(pi/4+alpha)sin(3pi/4+alpha)=cos 2alpha