Let θ be an angle such that cscθ = 9/8 and tanθ < 0. Find the exact values of cotθ and cosθ.
a) cotθ = -8/9, cosθ = 1/√2
b) cotθ = 8/9, cosθ = -1/√2
c) cotθ = -8/9, cosθ = -1/√2
d) cotθ = 8/9, cosθ = 1/√2