stefkellum58
19.12.2020 •
Mathematics
I anyone want to talk dont got snap or insta the only thing i have is g mail you dont have to just super bored
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Ответ:
May you please subscribe to my youtbr channel for a Florida_kik
Step-by-step explanation:
Ответ:
Well Guess what? Im bored tooo!
Step-by-step explanation:
So how are you doing?
Ответ:
a^2=b^2+c^2-2bc cos (A)
we shall proceed as follows;
The smallest angle is always opposite to the shortest side; Since 11 is our shortest side, the smallest angle is the angle opposite to this side. Thus;
let a=11 and our smallest angle be A
thus
11^2=13^2+19^2-2*13*19 Cos A
121=169+361-494 Cos A
121=530-494 Cos A
-409=-494 Cos A
dividing through by -494 we get;
Cos A=0.8279
thus
A=Cos(-1) 0.8279
A=34.113°≈34°
The answer is A=34°