The measure of angle is 7π/6. the measure of its reference angle is *blank* degrees, and sin is *blank*.

The measure of angle θ = 7pi/6. To convert this to degrees, substitute pi with 180 degrees. Pi is always equal to 180 degrees.
θ becomes: 7 x 180/6
Therefore, θ = 210 degrees.
And, to solve for sin θ, you can directly input sin (210) in the calculator. 
Thus, sin θ = sin (210) = -0.5 or -1/2

Iam not sure , but probably 750 or 7.5

sorey ik so sorey i need and need to answer a few