Помогите пожалуйста.
Найдите решение уравнения.
sin²α⁡+5sinα-6=0
sin²α⁡-5sinα+6=0
sin²α⁡-5sinα=0
sin²α⁡-1/2sinα=0
2cos²⁡x+7sinx+2=0
2cos²⁡α+7sinα+2=0
2cos²x+cosx=0
2cos²x-cosx=0
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