To determine values of trigonometric functions,
Step 1: Plot the coordinate on the coordinate plane
Step 2: Draw the angle in standard position, with the initial side on the positive x axis and the terminal side drawn from the origin to the coordinate (3, 4).
Step 3: Draw the right angle triangle
Step 4: Label the lengths of the sides x = 3 and y = 4,
Step 5: Using Pythagorean Theorem, determine side r. You will find that r = 5
Step 6: Knowing all three sides, determine the primary trigonometric ratios