Find the measure of the angle between two forces of 30 pounds and 35 pounds if the magnitude of their resultant is 42 pounds
2 answers:
Answer:
100 degrees
Step-by-step explanation:
30^2+35^2-2*30*35cos80
=42
180-80=100
Answer:
80 degrees
Step-by-step explanation:
42^2=30^2+35^2-2(30)(35)cosx
1764=2125-(2100)(cosx)
-361= -2100cosx
-361/-2100=cosx
0.1719047619=cosx
cos^-1x=80.10141556
Round off to the nearest degree=80
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