Final answer:
The expression sin 57 degrees can be found using a scientific calculator or trigonometric table and is approximately 0.8387.
Step-by-step explanation:
The expression sin 57 degrees is a trigonometric function that represents the ratio of the length of the side of a right triangle opposite the 57-degree angle to the length of the hypotenuse. To find the value of sin 57, one would typically use a scientific calculator or reference a trigonometric table, as this is not one of the commonly memorized trigonometric values. The exact numerical value can vary depending on the calculator or table, but to several decimal places, sin 57 degrees is approximately 0.8387. When calculating trigonometric functions, remember to ensure that your calculator is set to the correct mode, either degrees or radians, depending on the unit of the angle in your question.