They can convert between degrees and radians. Students know the definition of sine and cosine as y and x coordinates of points on the unit circle, and are familiar with the graphs of the sine and cosine functions. Students know the definition of the tangent and cotangent functions, and can graph them. Students know the definitions of the secant and cosecant functions, and can graph them. Students know that the tangent of the angle a line makes with the x-axis is equal to the slope of the line.
Students know the definitions of the inverse trigonometric functions, and can graph the functions.
Students compute, by hand, the values of the trigonometric functions and the inverse trigonometric functions at various standard points. Students use trigonometry to determine unknown sides or angles in right triangles. Students know the Laws of Sines and the Law of Cosines, and apply them to problems. Students determine the area of a triangle given one angle and the two adjacent sides. Students are familiar with polar coordinates.