The Pythagorean Theorem

In order to solve for the missing side, you need to choose the trigonometric function that includes the side you need to find and the side that you know, relative to the angle that you know. In

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How to Find the Missing Angle of a Triangle (Video & Examples)

This trigonometry video tutorial explains how to calculate the missing side length of a triangle. Examples include the use of the pythagorean theorem, trigonometry ratios such as sine,