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Dafna1 [17]
3 years ago
7

Prove that3/4cos3A=cos3A+cos^3(120+A)+cos^3(240+A)​

Mathematics
1 answer:
spayn [35]3 years ago
3 0

answer would be

1/ cosecA + 1/ secA

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Shelly is trying to improve her running time for a track race she ran the first race in 43.13 seconds her time was 43.1 seconds
lesantik [10]
I we consider her running times as an arithmetic series with common difference:
43.13 - 43.1 = -.03/2 = -.015, Shelly's time in the fourth race will be 43.1 - .015 = 43.085.
7 0
4 years ago
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Which expression represents the product of s and 39?<br>A=39-s<br>B=39÷s<br>C=39s<br>D=39+s​
Degger [83]
The answer would be c because it means Multiply and whenever a variable is next to a number in this case 39s then that means it a multiplication
So C. 39s
4 0
3 years ago
A school spent $2,587.50 on agendas for its 1,150 students. what is the unit price per agenda
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7 0
3 years ago
Solve for X. 11x+10=180
Ilia_Sergeevich [38]
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7 0
3 years ago
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ABCD has a perimeter of 27 units and is dilated by a scale factor of 1/3. What is the perimeter of A¹B¹C¹D¹?
Alex17521 [72]

Answer:

Perimeter of A'B'C'D' = 9 units

Step-by-step explanation:

Given:

Perimeter of ABCD = 27 units

Scale factor = 1 / 3

Find:

Perimeter of A'B'C'D'

Computation:

Perimeter of A'B'C'D' = 1/3[Perimeter of ABCD]

Perimeter of A'B'C'D' = 1/3[27]

Perimeter of A'B'C'D' = 9 units

4 0
4 years ago
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