Hi, I think you forgot to write a part of the problem, could you write the rest in the comments please. I would be happy to help you
Hello!
To find cosine, use the formula cos = adjacent / hypotenuse.
According to angle B, adjacent of angle B is side A, and the hypotenuse is side c because the hypotenuse is always opposite the right angle.
Therefore, the cosine of angle B is a/c.
The height of the jet in miles is 10 miles. There are 5280 feet in a mile, so you would divide 52800 by 5280 and get 10 miles.
It will tell you if the wall meet at a perfect right angle.
In a right triangle, the sum of the squares of the legs is equal to the square of the hypotenuse. This can be used to test any triangle.
