Werner Formula for Sine by Sine/Examples

Examples of Use of Werner Formula for Sine by Sine

Example: $2 \sin 10 \degrees \sin 30 \degrees$

$2 \sin 10 \degrees \sin 30 \degrees = \cos 20 \degrees - \cos 40 \degrees$

Example: $2 \sin 3 A \sin 5 A$

$2 \sin 3 A \sin 5 A = \cos 2 A - \cos 8 A$