Question

15.142 задания все пункты

Answer 1

12tg(a)+4tg(a)*cos(a)+3cos(a)+9=0

4tg(a) * ( 3+cos(a) ) +3(cos(a)+3) = 0

(3+cos(a))*(4tg(a)+3) = 0

$\left \ [ {{3+cos(a)=0} \atop {4*tg(a)+3=0}} \right. => \left \ [ {{cos(a)=-3} \atop {4*tg(a)=-3}} \right.=>\left \ [ {{\varnothing } \atop {tg(a)=-3/4=-0.75}} \right$

Вариант ответа №2 , tg(a) = -0.75