Find the missing length of a triangle using the cosine function

The video tutorial explains how to solve problems using right triangle trigonometry. It covers the properties of right triangles, including the hypotenuse and legs, and introduces the concept of theta as an angle. The tutorial details the use of sine, cosine, and tangent functions to solve problems by using the ratios of triangle sides. A practical example is provided, demonstrating how to calculate the length of a side using the sine function. The video concludes with a recommendation to visit a website for more practice problems.

How can you remember the ratios for sine, cosine, and tangent?

Describe the process of solving for an unknown side in a right triangle using trigonometric functions.