We are given the hypotenuse, an angle, and a side that is <em>adjacent </em>to the angle. If we need to find the angle, we use a trigonometric ratio known as cos(x):
We need to solve for x, so we need to cancel cos from the other side. The inverse of cos(x) is arccos(x):
now: x + (x +2) = 9090 or 2x + 2 = 9090 Solving this equation: 2x + 2 = 9090 subtract 2 from both sides 2x = 9088 divide both sides by 2 x = 4544 that means x + 2 = 4546