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Masteriza [31]
3 years ago
10

Make COS the subject of the formula

Mathematics
1 answer:
docker41 [41]3 years ago
6 0

c^2 = a^2 + b^2 - 2(ab)(cos C)

c^2 + 2(ab)(cos C) = a^2 + b^2

2(ab)(cos C) = a^2 + b^2 - c^2

cos C = (a^2 + b^2 - c^2) / 2ab - Answer choice E

Hope this helps! :)

You might be interested in
Which expressions are equivalent to 4^3 〖 x 4〗^(-5)? Choose all answers that are correct. 4^(-2) 1/16 4^(-15) 0.0625 〖16〗^(-1) 1
Alexus [3.1K]

Answer:

Tbh Idek what to tell you

Step-by-step explanation:

7 0
3 years ago
Help on #3 above??? I will give brainliest!
Leona [35]

Answer:

  f(x)\rightarrow 1\ \text{as}\ x\rightarrow\pm\infty

Step-by-step explanation:

"End behavior" generally refers to the behavior as the independent variable (x) gets large in the positive or negative directions. Here, the curve for large magnitude x flattens out and approaches 1. So, we say ...

  f(x)\rightarrow 1\ \text{as}\ x\rightarrow\pm\infty

7 0
3 years ago
Not sure how to do this
OLEGan [10]
It's pretty simple! So it looks like you are learning proportions. You would cross multiply to achieve your answer. 

First, let's do your first problem: 

2     12
--- = ----
5       n 

You would take 5 and multiply it by 12 and get 60! Then you would do the same with 2 times n, giving you 2n (because you do not know what n represents YET.) 

Now you should have this:
60=2n OR 2n=60

We must isolate our variable, in order to do that, get rid of two! But how? You would do this by dividing 2n by 2. Yet in equations, when you do something to one side, you must do it to the other because they must be EQUAL! (hence the "equa-" in equation) 

2n=60
---   ---
2      2  DIVIDE 2 into 60
----------
n= 30   Simplify! 

Your final answer for the first question is n= 30! 



8 0
3 years ago
How could we find the diameter of a circle with an area of 78.5 in.^ 2 ?? (3.14 is used for )
iris [78.8K]

Answer:

I think it's A AND C. The diameter is just the radius multiplied by 2 at the end of the day.B is just wrong.

8 0
3 years ago
Plz let me know if yes or no, and plz explain!!!
damaskus [11]

Answer:

Yes

Step-by-step explanation:

Because they are reflecting over a x intercept

7 0
2 years ago
Read 2 more answers
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