In the late 19th century, Karl Weierstrass invented a fractal-like function that was decried as nothing less than a ...

An inverse function takes the output and does the opposite to get back to the input. The cosine (cos) function takes the angle Ɵ and gives the answer to adjacent ÷ hypotenuse (in this example, ...

This version is used to calculate lengths. Calculate the length BC. Give the answer to three significant figures. Use the form \(a^2 = b^2 + c^2 - 2bc \cos{A}\) to calculate the length. \(\text{BC} ...