Найдите значение выражения; 8sin15 * cos15 * cos30
8Sin15°*Cos15°*Cos30° = 4* (2Sin15°Cos15°) * Cos30° =4 * Sin30°Cos30° = = 2 * (2Sin30°Cos30°) = 2 * Sin60° = 2 * √3/2 = √3
8sin15.cos15.cos30=4.2.sin15.cos15.cos30=4.sin30.cos30= =2.2.sin30.cos30=2.sin60=2.(√3)/2=√3