I need to some on my test!

I think its A

Step-by-step explanation:

a

Step-by-step explanation:

3/5 = sin(b)

Step-by-step explanation:

Equation

Tan(b) = sin(b)/cos(b)                         Multiply both sides by cos(b)

cos(b)*tan(b) = cos(b)sin(b)/cos(b)    Simplifiy

cos(b)*tan(b) = sin(b)

Givens

Tan(b) = 3/4

Cos(b) = 4/5

Solution

4/5 * 3/4 = sin(b)

12/20 = sin(b)

3/5     = sin(b)