Пожалуйста, помогите решить. Тригонометрия 11 класс4sin120*cos150
4* sin120*cos150= 4*sin(180-60)*cos(180-30)=4*sin60*(-cos30)= -4*√3/2 * √3/2= -4*3/4=-3
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4* sin120*cos150= 4*sin(180-60)*cos(180-30)=4*sin60*(-cos30)= -4*√3/2 * √3/2= -4*3/4=-3
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4sin120*cos150= 4sin(180–60) * cos(180–30)=4 sin60 *(– cos 30)= – 4*3/4=–3