Question

Suppose each edge of the cube shown in the figure is 10 inches long. Find the sine and cosine of the angle formed by diagonals DE and DG.

Answer 1

the second one

Answer 2

cools, so first find the length of the line DG using pythag

\[h^2 = a^2 + b^2 \]

DG^2 = CD^2 + CG^2 where CD and CG each = 10

Answer 3

then use that length to find the angle between DG and DE using SOH CAH TOA

so tan (theta) = opposite length / adjacent length
tan (theta) = GE / DG where GE = 10

Answer 4

once you have the angle (theta) simply hit cos on the calc then sin on the calc to find your required answers

Answer 5

Thanks, I appreciate! I tackle it now! ^^

Answer 6

sweet, good luck dude

Answer 7

^^