EASY QUESTION

Read question 7

Topic: Volume

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

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7