Suppose each edge of the cube shown in the figure is x inches long. find the sine and cosine of the angle formed by diagonals cf and ch.

 The answer is  

Step-by-step explanation:  Given in the question that ABCDEFGH is a cube with edge length 'x' inches. We need to find the sine and cosine of the angle formed by the diagonals CF and CH.

As shown in the attached figure, we cut ΔCFH from the cube, which is a right-angled triangle at ∠CHF=90°. Let, ∠FCH = α.

Now, we need to find the sine and cosine of α.

Since each side of a cube is a square, so CDHG is a square and CH is its diagonal. So,

Again, from right-angled triangle CFH, we have

Therefore,

and

Thus, the answer is

the answer is 5/3x+7/5y+7

439400

step-by-step explanation:

130^2 = 16900

16900*26 = 439400