45% of x is 72. Find the value of x.

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Which inequalities can be used to find the solution set of the following inequality? check all that apply. |2x – 5| (2x – 5) (2x + 5) –(2x – 5) –(2x + 5)