Checklist for using trig ratios and right triangles

1,294 views · Published 7 November 2012 · 3:47 · Indexed 6 November 2026

Channel: MooMooMath and Science · 2012 · Education

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Use this step by step checklist for using trig ratios in order to find missing angles or leg lengths of a right triangle.

Step 1. Decide which trigonometric ratio you should use.
The trig ratios are sine, cosine, and tangent.
Step 2. Set up the problem with three different values. The angle and the sides of the right triangle. You will decide if you the value of an opposite side, adjacent side, or the hypotenuse.
Step3. Find the value of the trig ratio
Step4 Use a cross product
Step 5 Solve
This checklist can be used to find the missing lengths and angles of a triangle with one ninety degree angle.


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