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Ludmilka [50]
3 years ago
8

Cos(0.5)+cos(0.5+2(3.14159265))+cos(0.5+4(3.14159265))

Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
7 0

Answer:

2.63274768567

Step-by-step explanation:

First, note that 3.1415... is p, so 2(3.1415...) is 2pi and 4(3.1415...) is 4pi.

2pi and 4pi are full rotations, which will lead to the same cosine (i.e. cos(x) = cos (x+2pi) = cos(x+4pi) = ... = cos (x+2k*pi)).

So, the expression equals cos0.5 + cos 0.5 + cos0.5 = 3cos0.5 = 3(0.87758256189) = 2.63274768567

I hope this helps! :)

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#23-6: The pool concession stand made $5,800 in June and $6,300 in July. What is the percent of increase in sales? Round the ans
katrin [286]

Answer:

8.6%

Step-by-step explanation:

To find the percent change, you will need to compute the positive difference and then divide the difference by the original (the older amount).

So the positive difference will be obtain by doing larger minus smaller:

 6300

- 5800

-----------

   500

The older amount was 5800.

So 500/5800 is the answer as a un-reduced fraction.

I'm going to reduce it by dividing top and bottom by 100:

500/5800  = 5/58

5/58 is the answer as a reduced fraction.

5 divided by 58 gives=0.086206897  in the calculator .

Approximately 0.0862 is the answer as a decimal.

To convert this to a percentage, multiply it by a 100:

8.62%

Rounded to the nearest tenths is 8.6%

-------------

So 5800+5800(.0862) should be pretty close to 6300 (not exactly though since we rounded).

5800+5800(.0862)=6299.96 using the calculator.

8 0
3 years ago
What is the slope-intercept form of an equation?<br> pls help me thanks
Stels [109]

Answer:

It is the number before x.

Step-by-step explanation:

An example would be if some said to find the slope intercept form of 5/6x+3 the slope intercept form would be 5/6.

4 0
4 years ago
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siniylev [52]

Answer:

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Step-by-step explanation:

when it is disconceted it will cause it to shut off

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5 0
3 years ago
Read 2 more answers
Simplify the expression by combining like terms.2x + 4y + 6 + 2y - 5 + 3x
zlopas [31]

Answer:

Step-by-step explanation:

Here is the workings

2x+4y+6+2y-5+3x  combine like terms

2x+3x+4y+2y+6-5

Step 2

2x+3x+4y+2y+6-5   Add the similar exponents

5x+4y+2y+6-5

5x+6y+6-5

Step 3

5x+6y+6-5  Add and subtract

Your answer would be 5x+6y+1

7 0
3 years ago
Equation for (6,17) (14,17)
bixtya [17]

Answer:

y=17

Step-by-step explanation:

y=mx+b

m=(17-17)/(14-6) = 0

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8 0
3 years ago
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