What error did Clyde make, and what is the correct simplified form?

Find the third,fifth and seventh term sequence described by each rule a(n)=n+1

If 90° < θ < 180° and cotθ = -1/3, then cscθ =

Guests at an amusement park must be at least 54 inches tall to be able to ride the roller coaster. which graph represents the set of heights that satisfy this requirement?