Idon’t know how to do it, can someone on just this one so i can do the rest on my own?

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths