Which statement defines the term capacity

Evaluate cos2θ for cosθ = square root of 3/2

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288