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umka2103 [35]
3 years ago
5

Prove that (Cosx-Cos³x)/Sinx=SinxCosx​

Mathematics
1 answer:
77julia77 [94]3 years ago
4 0

Answer:

(Cosx-Cos³x)/Sinx=SinxCosx

Step-by-step explanation:

sin3x−cos3x

=sinxsin2x−cosxcos2x

=sinx(1−cos2x)−cosx(1−sin2x)

=sinx−sinxcos2x−cosx+cosxsin2x

=sinx−cosx+(sinx−cosx)sinxcosx  

=(sinx−cosx)(1+sinxcosx

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Out of 132 seventh graders 33 voted math as their favorite subject. What percentage is this?
snow_lady [41]

Answer:

25%

Step-by-step explanation:

To find the percentage, we take the amount that found math as their favorite subject and divide it by the total amount of students.

33/132 = .25

This is in decimal form.  To change it to percent form, multiply by 100

.25 * 100 = 25 percent

6 0
3 years ago
Read 2 more answers
2. Write an equation in siope-interceptform to represente relationship in the table ​
iren2701 [21]

Answer:

-4/-5

Step-by-step explanation:

you have to pick 2 numbers from the y row and the x row i picked -7 and 3 and -5 and 0 so first you would do 3-(-7) and that would be -4 and then do -5-0 and that would be -5 then you would put the y/x

4 0
3 years ago
The price of a watch is $55. Alif paid $200 and he received a balance more than $35. Find the maximum number of watch bought by
maxonik [38]
The maximum number of watches Alif could buy is 3 watches. 55+55+55=165. The remaining money is 35!
7 0
3 years ago
Help
BigorU [14]

Answer:

69

thats it all of them are 69

4 0
3 years ago
Yolanda has 3/4 of a cup of sugar. This is 3/5 of what she needs. How much sugar does Yolanda need?
finlep [7]

Answer:

1\frac{1}{4} cups

Step-by-step explanation:

<h2>1. Info we have</h2>

3/4=3/5

<h2>2. Solving</h2>

3/4*1/3=3/5*1/3

1/4 = 1/5

1/4*5=1/5*5

5/4=5/5

5/4= 1 and 1/4 cups

Hope this helped! Please mark brainliest :)

~~ SUMMER ~~

8 0
3 years ago
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