I hope you are familiar with the concept of sine waves. Idea behind this test is to make you familiar with the boundary value conditions. For people not familiar with Sine wave, this is how a sine wave looks.

Now in this figure horizontal scale represent values for the X-Axis and vertical scale represent the values for Y-Axis. Imagine you have a function, which accepts one input which is value of the X-Axis and based on the value of X-Axis, this function gives value of Y-Axis based on the sine wave drawn above. For example, if you give value of X-Axis as 2, function will return 275. Similarly, if you give value of X-Axis as 12 function will return - 275 (negative). Now based on this information you have to write boundary conditions for this function. For the purpose of this puzzle, you can assume that values for the X-Axis can be given in the increments of one and decimals are not allowed.

Remember, TestingGeek is not interested in all the test cases but test cases related to boundary values only. You can write your test cases here, by giving values of X-Axis and evaluate your test data. Once you are done with all the test cases you can think of, check your performance. If you want to restart your test anytime, just click on the restart test button. TestingGeek has not covered all the possible test cases here as idea is to give you sufficient information to get started.