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zzz [600]
4 years ago
9

Trig: Use a half angle formula to find the exact value of the expression? cos(5pi/12)

Mathematics
1 answer:
stepladder [879]4 years ago
4 0
I believe that the correct answer would be 0.999739299
5 * 3.14 = 15.7
15.7/12 = 1.308333333
cos(1.308333333)
0.999739299
You might be interested in
How to solve 2y(3y+17)=12
Nataly [62]
Distribute 2y to both 3y and 17
• 6y+34= 12
then you subtract 34 on both sides and get:
• 6y=-22
Finally you divide 6y on both sides and end up with:
y= -11/3 as a fraction

Hope this helped!
7 0
3 years ago
In the diagram, `stackrel(harr)(PR)` and `stackrel(harr)(AC)` are vertical lines, while `bar(CB)` is a horizontal line segment.
Tomtit [17]

CR:RB = 2:3


CB:CB = 2:5


AQ:AB=2:5


That means we start at A and go 2/5 along the way toward B to get Q:


Q = (-4,-2) + \frac 2 5(1 - -4, -7 - -2) = (-4,-2) + \frac 2 5(5,-5) = (-4,-2)+(2,-2)=(-2,-4)


Answer: Q=(-2,-4)


8 0
3 years ago
13 and 4/87 to the nearest half
Arte-miy333 [17]

Answer:

13

Step-by-step explanation:

4/87 is around 0.046

13+0.046=13.046

13.046 to the nearest half is 13

3 0
3 years ago
Can somone pls help me .. i will mark u brainliest !
frutty [35]

Answer:

1. D

2. A

3. B

Step-by-step explanation:

1. Add exponents

2. Multiply exponents to outside exponent and to the 16

3. Distribute exponents

6 0
3 years ago
Addicted to the Internet?The Ann Arbor public school officials would like to estimate the population mean daily Internet usage t
Lana71 [14]

Answer:

We can assure the Ann Arbor officials that after look the information we conclude that the mean is 8 h

Step-by-step explanation:

From CI ( 95 % )  = ( 6,7 ; 9,3 )

And the information "large random size sample" we conclude that the population has a normal distribution; a normal distribution has a bell shape curve, and data must spread symmetrically with respect to the mean, therefore the mean is:

6,7 + 9,3 = 16

16/2 = 8

If we need t check we can use the other CI

CI ( 99 % ) = (6,257 , 9,743 )

6,257 + 9,743 = 16

16/2 = 8

We are sure the mean is 8 h  

6 0
3 years ago
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