In circular functions like sine and cosine, equations can have multiple solutions within a specific interval. If all possible values are considered, these functions can have infinitely many solutions.

sin x ∘ = 3 4 Since this is sin and is positive this means that we will be in the two quadrants where the sine function is positive - the first and second quadrants.

Pages Sin, cos and tan Before we can use trigonometric relationships we need to understand how to correctly label a right-angled triangle.