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
Answer:
How long did she work for though?
Step-by-step explanation:
Answer is -44+x^2 . First you need to evaluate the equation and get 5+x^2-49 then u calculate it and your final answer is -44+x^2
2-29 it was b but if you lo
Answer:
450,425
Step-by-step explanation:
2000 1200 800 600 500 450 425
-800 -400 -200 -100 -50 -25
÷2 ÷2 ÷2 ÷2 ÷2
