I cannot for the love of my life figure out why I get the message: "unsupported operand type(s) for *: 'float' and 'builtin_function_or_method'". I've looked at pretty much all the suggestions on this website. Please help!
math.cos is a function, in particular it's a
builtin_function_or_method - which explains the error message.
That means you have to call it with an argument to get a number, just like you did with