Please help I don't know whatt it is

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

Graph the line y=4/3 x+1 . use the line tool and select two points on the line.

Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture