Buktikan bahwa: cos(a+b)+cos(a-b)=2cos a cos b

Name: Buktikan bahwa: cos(a+b)+cos(a-b)=2cos a cos b
Uploaded: 2024-02-16T15:34:08.000Z
Duration: PT1M31.5S
Description: Buktikan bahwa: cos(a+b)+cos(a-b)=2cos a cos b