Cópia de The Unit Circle - and introduction investigation

This is an introduction to the unit circle.
1. What does angle alpha represent?[br]2. When could alpha be negative?[br]3. Can alpha be greater than 360?[br]4. What is the relationship between sin(alpha) and the y coordinate of A?[br]5. What is the relationship between cos(alpha) and the x coordinate of A?[br]6. In which quadrants is sin(alpha) positive?[br]7. In which quadrants is cos(alpha) positive?[br]In which quadrants is tan(alpha) positive?
– johndickinson233, John Fitzgerald

Information: Cópia de The Unit Circle - and introduction investigation