Which of the following statements are true about functions and relations? No trigonometric functions are relations. All trigonometric functions are relations. A trigonometric function may or may not be a relation. The vertical line test will not work for trigonometric relations.
The answer is "All trigonometric functions are relations"
All functions are relations, and all trigonometric functions pass the vertical line test because, within their domain, there is only one defined y value for every x value.
