Buktikanlah: cos (A+B)-cos (A-B)=-2 sin A sin B

Name: Buktikanlah: cos (A+B)-cos (A-B)=-2 sin A sin B
Uploaded: 2024-01-25T06:32:00
Duration: PT1M44.934S
Description: Buktikanlah: cos (A+B)-cos (A-B)=-2 sin A sin B