How much does the 2nd item cost before tax?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Find cot x if sin x cot x csc x = √2

Pls never taught i’m really confused and i rlly need