Answer: 2
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According to the trigonometric functions, we can see that angle x can be found through the one that involves the adjacent side and the hypotenuse, which in this case is the cos,

then, if we apply the inverse we can find the value of x,

Answer:
The class midpoint is the lower class limit plus the upper class limit divided by 2 . Add the midpoints column to the original table.
I'm sure the trjangle
is acute