Trigonometry

Use trigonometry to find the length of the hypotenuse in the triangle below. You have been given the adjacent side and the angle. 

Cover up the information you have, and the information you are trying to find in the working triangles below. 

Use cosine because there are three circles in the cosine triangle. 

Cover up the H because you are trying to find the hypotenuse. 

This means that you have to divide the adjacent by the cosine of 17°