Lucy is running a test on her car engine that requires her car to be moving

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

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?