(sin 3x/sin x)+(cos 3x/cos x)=4cos 2x

Name: (sin 3x/sin x)+(cos 3x/cos x)=4cos 2x
Uploaded: 2024-01-24T22:12:00
Duration: PT3M29.3866S
Description: (sin 3x/sin x)+(cos 3x/cos x)=4cos 2x