Whoever answers correctly get brainliest.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no. explain your mathematical thinking