What are the sine, cosine, and tangent of (2 pi)/3 radians?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.