Question

помогите пожалуйста!!
1) 1-sin^2 60°;
2) 1+cos60°\1-cos60°;​

Answer 1

1) 1- sin²(60°) = 1 - (√3/2)² = 1 - 3/4 = 1/4 = 0,25

2) (1+cos(60°))/(1-cos(60°)) = (1 + 0,5)/(1 - 0,5) = 1,5/0,5 = 15/5 = 3