What are some characteristics of the Cosine Curve?
Some of the characteristics of the Cosine Curve include:
- a hill and valley pattern in its graph
- a domain of all real numbers
- an even function
The last characteristic is very important to answer this question. An even function is a function in which it stays they same when flipped across the y axis (vertically).
Some functions, like y =
changes when flipped vertically, because it is not symmetric to the y-axis.
However, because a cosine curve is symmetric to the y axis, it is an even function, and vice versa.
Your answer is A