Question

найди cos £, tg £. cfg£. а) sin£=3/5, 0<£<П/2

Answer 1

Cos=√(1-sin²) = √(1-9/25) = 4/5
Tan=sin/cos=3/5:4/5=3/4
Ctan=1/tan=1:3/4=4/3=1 целая 1/3