Prove thatcos^2α(cosec^2α-cot^2α)=cos^2α​

What is the product of the radical expression. (7-2square root) (8+2 square root)

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.