This problem demonstrates how you enter function answers into WeBWorK.

For example, the function $\sin\; x$. When entering the function, you should enter sin(x), but WeBWorK will also accept sin x or even sinx.

We said you should enter sin(x) because you are less likely to make a mistake this way.
Try this to see what we mean: We want "sin of 2x"
Type in: sin 2 x
Type in: sin(2 x)

Click on the Preview Answers button below, and notice what expressions are displayed. The value line is not there, since the answer is not a number. Then click on Submit Answers to see how your answers are graded. You can answer a problem as many times as you want (except for true/false or multiple choice).