Using your answers from the previous problem, rewrite each of the following trigonometric expressions. Express your answer as a single trigonometric ratio without fractions.
a. tan (θ )· cos (θ )
b. cot (θ )· sec (θ )
c) sec (θ )/csc (θ)=1/sin (θ )
d) sin (θ )/tan (θ ) · cot (θ )· csc (θ)