Which basic trigonometric identity would you use to verify that tan x cos x =sin x

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr