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gtnhenbr [62]
2 years ago
11

16) Please help with this question. Please answer with normal text (Ex: pi/4,etc... not math settings).

Mathematics
1 answer:
svetlana [45]2 years ago
6 0
We can use tan(x) = sin(x)/cos(x). Plug in numbers to get:
tan(x+pi/2) = sin(x+pi/2)/cos(x+pi/2) 

Here, you can use the sin and cos addition identity:
tan(x+pi/2) = (sin(x)cos(pi/2)+cos(x)sin(pi/2))/(cos(x)cos(pi/2)+sin(x)sin(pi/2))

If you simplify this, you get:
0+cos(x)/0-sin(x) 

Which is the definition of cot(x). But, we can't forget about the '-' sign, so, the answer is -cot(x)
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Jessica earned $16 mowing a neighbor's yard. She bought a craft kit for $7.37. She used $3.75 to buy food for a food drive. She
iogann1982 [59]

Answer:

$4.88

Step-by-step explanation:

Jessica made $16 mowing a neighbors yard

She brought a craft kit for $7.37

16-7.37

= 8.63

She used $3.75 to buy food for a food drive

8.63-3.75

= 4.88

Hence the amount Jessica put in the savings account is $4.88

4 0
2 years ago
Read 2 more answers
What is the measure of EFC
Elanso [62]

Answer:

The Expected Family Contribution (EFC) is a measure of your family's financial strength and is calculated according to a formula established by law. Your family's taxed and untaxed income, assets, and benefits (such as unemployment or Social Security) are all considered in the formula.

Step-by-step explanation:

i hope this helped!!

4 0
3 years ago
Solve each of the quadratic equations.<br><br> 3x=0.5x^2 <br><br><br> 0=5x^2-2x+6
Kipish [7]

Answer:

6x=0.10x< 2

Step-by-step explanation:

8 0
3 years ago
can someone help me solve this multiplying polynomial question? it would really help, the screenshot is attached (:
Korvikt [17]

Answer:

-20x³ + 0x² + 15x - 20

Step-by-step explanation:

I would have said it the other way.

"Multiply each term in the top row by -5."

 4x³ +  0x   -  3x +  4

<u>×(-5</u>)  <u>×(-5</u>)  <u>×(-5)</u>  <u>×(-5) </u>

-20x³ + 0x² + 15x -20

3 0
3 years ago
Find the service area of the cylinder in terms of pi
Ymorist [56]
= <span>678.58 divided by pi = 216
your answer is the first bubble</span>
7 0
3 years ago
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