Helpppp me guysssss thanksssss
1 answer:
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Answer:
Step-by-step explanation:
4.
2ab cos C=a²+b²-c²
2×31×14 cos C=31²+14²-40²
868 cos C=961+196-1600=-443
cos C=-443/868
C=cos^{-1}(-443/868)≈120.688≈120.69°
5.
by sine formula
m∠B=180-(62+55)=180-117=63°
Answer:
x = 48
Step-by-step explanation:
The trick here is to get everything into the numerator. To do this, we multiply everything by 4*3.