HELP

verify identity

(1 - tan2(x)/ sec2(x) = cos(2x)

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

Opposite angles in a parrellelogram are

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120