Ответ: =√6/2
Объяснение: sin(α – 60°) + sin(α + 30°) , α=75° =>=
sin(75°-60°)+sin(75°+30°)= sin(15°) + sin105° = sin15°+sin75° =
=2 sin ((75+15)/2) * cos ((75-15)/2) = 2*sin45°*cos30°= 2*(√2/2)* (√3/2)=
=√6/2
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Ответ: =√6/2
Объяснение: sin(α – 60°) + sin(α + 30°) , α=75° =>=
sin(75°-60°)+sin(75°+30°)= sin(15°) + sin105° = sin15°+sin75° =
=2 sin ((75+15)/2) * cos ((75-15)/2) = 2*sin45°*cos30°= 2*(√2/2)* (√3/2)=
=√6/2