Classwork Series and Exercises {Mathematics JSS2}:

JSS 3 Mathematics Second Term Week 7 Topic: SINE AND COSINE OF ANGLES The sine (abbreviated "sin") and cosine ("cos") are the two most prominent trigonometric functions. All other trig functions can be expressed in terms of them. In fact, the sine and cosine functions are closely related and can be expressed in terms of each other. Definition [...]