How to use the inverse cosine function to find the missing angle of a triangle

The video tutorial guides students through solving for an angle in a right triangle using trigonometry. It begins with identifying the angle and sides of the triangle, then selecting the appropriate trigonometric function, cosine, based on the given sides. The instructor demonstrates how to calculate the angle using the cosine inverse function and emphasizes the importance of verifying calculations. The lesson concludes with a brief discussion on rounding results.

What is the first step in solving for the angle X?

How do you identify the sides of the triangle in relation to angle X?

Which trigonometric function is used when dealing with the adjacent side and the hypotenuse?

What is the formula for cosine in relation to angle X?

How do you calculate the angle X using the cosine inverse?