1-sinθ=½, sinθ=½, θ=π/6 and 5π/6 using the ASTC Rule. We can add 2πn to each of these to find other values, where n is any integer.
cosθ=-√3/2, θ=5π/6 and 7π/6. We can add 2π to each of these to find other values.
But to satisfy both equations θ=5π/6 ± 2πn.
tanθ=-√3/3 and cotθ=-√3;
sinθ=½, cscθ=2;
cosθ=-√3/2, secθ=-2/√3=-2√3/3.