SOH CAH TOA This is the acronym for all trigonometric ratios. Sin. = opposite/hypotenuse Cos. = adjacent/ hypotenuse Tan. = opposite/ adjacent.
In this picture the OPPOSITE leg and the HYPOTENUSE is given to us. With this information we can apply the "TOA" ratio.
Sin. R = opposite/hypotenuse Sin. R = 3/4 or 0.75 Use a calculator or table to find 0.75 in the sin. column. The final answer should be 49. Sin. 49 = 0.7547
