Question

Помогите решить пример
cos²30°+sin²52°+cos²52°

Answer 1

$displaystyle tt cos(30^{circ})^2+sin(52^{circ})^2+cos(52^{circ})^2=bigg(frac{sqrt{3}}{2}bigg)^2+1=frac{3}{4}+1=frac{3}{4}+frac{4}{4}=frac{7}{4}=bold{1,75}$