1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aev [14]
2 years ago
5

os(9x)]} \, dx" alt="\int{[sin(9x)cos(9x)]} \, dx" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Sladkaya [172]2 years ago
5 0

Recall the double angle identity,

sin(2x) = 2 sin(x) cos(x)

Then we can write

sin(9x) cos(9x) = 1/2 sin(2 • 9x) = 1/2 sin(18x)

Then

∫ sin(9x) cos(9x) dx

= 1/2 ∫ sin(18x) dx

= -1/2 • 1/18 cos(18x) + C

= -1/36 cos(18x) + C

though you could continue with another double angle identity,

cos(2x) = cos²(x) - sin²(x)

to rewrite the antiderivative as

= -1/36 (cos²(9x) - sin²(9x)) + C

= 1/36 (sin²(9x) - cos²(9x)) + C

You might be interested in
Yana is using an indirect method to prove that segment DE is not parallel to segment BC in the triangle ABC shown below: A trian
kolezko [41]

Please see attached file for the triangle’s figure:

 

Going with the image attached, if DE is parallel to BC<span>
then
<span>4: (4 + 5) = 6 : (6 + 7).

Therefore, the inequality that she will use to contradict the assumption</span> is 4:9 ≠ 6:13</span>.

To add, a relation that holds between two values when they are different in mathematics is called an inequality. A is not equal to b also means the notation a ≠ b.

<span><span>

</span>Inequalities are governed by the following properties<span>:

Transitivity</span></span>
 Converse
 Addition and subtraction
 Multiplication and division
 Additive inverse
 Multiplicative inverse
<span>Applying a function to both sides</span>

7 0
3 years ago
Read 2 more answers
Translate; a number x is greater than -8 and less than or equal to 4
vazorg [7]
I think this would be 4≥X<span>>-8


</span>
5 0
3 years ago
Please answer as soon as possible! Brainliest and lots of points! Please give good details and make sense! Thanks! (See attachme
professor190 [17]

Answer:

no because they did not multiply the whole numbers and just multiplied the powers

Step-by-step explanation:

6 0
3 years ago
FACTOR EACH EXPRESSION, IF IT CANT BE FACTORED WRITE CANNOT BE FACTORED. 1. 4x+12
dimaraw [331]
1.) 4(x+3)
Find the GCF, Greatest Common Factor, of 4x and 12. 
4x=2*2*x
12=3*2*2
The greatest common factor is 4. Put this outside of the parentheses.             (You would multiply the 2*2)
Then, put the rest of the factors as a sum. (Only the factors on the same line.)
Solution: 4(x+3)

To check, distribute to see if it works.

4x+12

2.) 2(4r+7)
Find the GCF of 8r and 14
8r=2*2*2*r
14= -1*7*2
The greatest common factor is 2.                                                                 (There is only 1 two, so you would not multiply them.)
Then, put the rest of the factors as a sum. (Only the factors on the same line.)
Multiply the 2*2*r as one addend and the -1*7 as the other.
Solution: 2(4r-7)

To check, distribute to see if it works.

8r-14

Do you get it now?

3.) 5(x+7)
4.) 7(2x+1)
5.) Cannot be factored.

32x-15
Find the GCF of 32x and -15

32x: 2*2*2*2*2*x
-15: -1*5*3

Because there are no similar factors other than 1, it cannot be factored.

6.)  8(4x+3)
7.) 3(2x-3)
8.) 24(1x+2)
9.) 9(-2x+8)
10.) Cannot be factored
11.) 8(1x+3)
12.) 50(1x+5)



4 0
3 years ago
Read 2 more answers
Which<br>expression is equivalent to 1/5m -20​
muminat

There are infinite equivalent expressions. Here are some:

1/5(m-100)

20(1/100m-1)

1/5m-(4•5)

If you expand any of these or any of the terms, you will get an equivalent expression.

7 0
3 years ago
Other questions:
  • HELP ME ON THIS PLEASE
    14·2 answers
  • 4 1/6 divided by 1 1/3
    13·1 answer
  • 0.39 is 15% of what number
    13·1 answer
  • Solve for x need help asap
    8·1 answer
  • Pls answer question 6 and 7
    11·1 answer
  • Can anyone help me, I think we need to use desmos
    9·1 answer
  • -5/8+(-8/5)= i do not understand how to solve this
    14·1 answer
  • What percent of 32 is 8?
    12·1 answer
  • Solving systems of 3 equations <br> 2x-y-3z=4<br> 4x+2y+z=10<br> 4x-y+4z=-8
    7·1 answer
  • Select from the drop-down menus to correctly complete the statement. The expressions 3.22 1 and 10 – 0.33 . 2 should be joined b
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!