Cos is the ratio between adjacent side (of the given angle thieta) to the hypotenuse of the triangle.
0.760405966
The radical answer is sqrt(3)/2. (0.86602540378443864676372317075294)
Cos(22.5)=0.9238795325
long number
In a problem which can be represented by a right angled triangle, the value of the cosine of an angle can be found by dividing the length of the side adjacent to the angle with the length of the...