Answer:
Angle B = 106.6 degrees
Step-by-step explanation:
b^2= a^2+c^2-2*a*c*cosB
9*9 = 4*4 + 7*7 - 2*7*4*cosB
81= 16+49-56cosB Subtract 16 and 49 from both sides
16= -56cosB Divide by -56 on both sides.
cosB= -16/56 Take the arccosine of both sides
B=arccos(-16/56)
B= 106.6
The answer to this question is B
Answer:
There is nothing to solve but if you attach a picture or type it out I can try to help.
Step-by-step explanation:
Answer: -12
Step-by-step explanation:
(1,-3) (2,-9) m=-12
Answer:
Third Option!
Step-by-step explanation:
Sorry if i'm wrong :(
