cotθ and sinθ; secθ = - (9/2); sinθ >0
sec θ = -9/2
cos θ = -2/9
sin θ = sqrt(1 - cos2 θ) = \(\dfrac{\sqrt{77}}{9}\)
cot θ = cos θ / sin θ = \(\dfrac{\frac{-2}{9}}{\frac{\sqrt{77}}{9}}\)= \(\dfrac{-2}{77}\sqrt{77}\)