Answer: https://www.coursehero.com/file/36434863/math-124docx/
<u><em>Step-by-step explanation: In this WEB you will research for your answer you just need to Signed up i think so </em></u>
<u><em>( you need to copie this web on google )</em></u>
<u><em>If you need help ask me</em></u>
Answer:
No... i'm sorry
Step-by-step explanation:
Answer:
We use cosine rule also called cosine law which states
c^2=a^2+b^2-2abcosC
given
a=8cm, b=7cm, c=9cm cos C?
9^2=8^+7^2-2*8*7 cos C
expand
81=64+49-112 cos C
like terms together
81-113=-112 cos C
-32=-112cos C
multiply both sides by -1
32=112cos C
divide both sides by 112
32/112=cos C
cosC=0.2857
find cos inverse of 0.2857
angle C= 73.40
1/2 are science because if you make 1/3, 2/6 + 1/6= 3/6. 3/6 = 1/2. 1/2 and 1/2 make a whole.
