Find the circumference of the given circle use 3.14 pie and 7 in diameter

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Use the squared identities to simplify sin^2x cos^2x

Astore is having a sale in which all items are reduced by 20 percent. including tax, jennifer paid $21 for a pair of shorts. if the sales tax is 5 percent, what was the original price of the shorts