Question

Памагити. Пожалуйста

Answer 1

Ответ:

0.75

Объяснение:

Tg(A) = Sin(A)/Cos(A)

Cos(A) = Sqrt(1-Sin(A)^2)

Tg(A) = Sin(A)/Sqrt(1-Sin(A)^2)

= 3/5 / sqrt(1 - (3/5)^2)

= 0.6 / sqrt(1 - 0.36)

= 0.6 / sqrt(1 - 0.36)

= 0.6 / 0.8

= 0.75

Answer 2

sina=3/5;π/2<a<π;tga=?


cos²a=1-sin²a=1-9/25=16/25
cosa=-4/5

tga=sina/cosa=3/5:(-4/5)=3/5*(-5/4)=-3/4

otvet (-3/4)