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schepotkina [342]
3 years ago
6

Find the exact value of cos(7pi/12) using half-angle identities. I'm still not sure how to solve this :( Any help is appreciated

!
Mathematics
2 answers:
Norma-Jean [14]3 years ago
7 0
Did you plug it into your calculator? That's a great place to start.
Anna007 [38]3 years ago
6 0

Answer:

I had no idea how to solve this on edge either. I ended up looking on you tube and found this guy named Larry. He did it step by step in a short video!!! I will put it down below so you can watch it if you need help.

Step-by-step explanation:

The answer is B.√2-√6 over 4

video name on you tube:

cos 7pi/12 find the exact value of the trig function

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A bag contains 5 blue marbles, 2 green marbles, and 3 yellow marbles. What is the probability of choosing one green marble and t
Vesna [10]

Answer:

Step-by-step explanation:

Total number of marbles = 5 + 2 + 3 = 10

Probability of choosing 1 green marble = 2/10

Probability of choosing 1 yellow marble = 3/10

Notice (and this is important) that the denominator didn't change. Why?

Because you replaced the first marble into the bag. That word replacement is critical in a problem of this nature. There is the term non replacement which means that the second draw would have a denominator of 9.

So what is the probability of P(green then yellow)?

P(green then yellow) = 3/10 * 2/10 = 6/100

Answer: P(green then yellow) = 3/50 because 6 / 100 reduces.

4 0
3 years ago
What is “One third of the opposite of a number is less than 12?”
nirvana33 [79]

Answer:

\frac{1}{3}(-x)<12

4 0
3 years ago
Ummm help ig please................
AlexFokin [52]

Answer:

Cost of 500 g of standard pack = € 7.50

Cost of 1 g of standard pack = 7.50/500

Cost of 100 g of standard pack = 7.50/500 ×100

= 7.50/5

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Hope it helps uh dear

8 0
3 years ago
Solve each expression 2n^2+3n-2
Gnom [1K]
Simple, solve straight across, its either 4n or 2n
5 0
3 years ago
Read 2 more answers
3. For the following system of equations, complete a table of at least 5 points for each equation, then graph the system on the
8090 [49]

Answer:

I'll do it for the equation, then you can try to solve the second one. Of your not able to, just comment and I'll answer the second one

Step-by-step explanation:

y = -3x+4

When

___x__l  _y____

   0          l    4

   1           l     1

   2          l     -2

   3          l     -5

   4          l     -8

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3 years ago
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