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Sophie [7]
2 years ago
15

Which of the following are solutions to the equation cos^2 2x-1/4=0? Check all that apply.

Mathematics
1 answer:
Nata [24]2 years ago
6 0

Answer:

D

Step-by-step explanation:

Cos^2 2x=1/4

Cos 2x =+-1/2

2x=z

Cos z=+-1/2

z1=pi/3

z2=11pi/3

z1 and z2 are possible.

x1=pi/6

x2=11pi/6

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Katen [24]
The missing angle is 49 :)
8 0
2 years ago
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Please explain how this digraph works.
dusya [7]

Angles XQL and MQR are congruent because they are vertical angles. So

209 - 13 <em>b</em> = 146 - 4 <em>b</em>

Solve for <em>b</em> :

209 - 13 <em>b</em> = 146 - 4 <em>b</em>

209 - 146 = 13 <em>b</em> - 4<em> b</em>

63 = 9 <em>b</em>

<em>b</em> = 63/9 = 7

Then the measure of angle XQL is

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3 0
3 years ago
Which fraction is equivalent to<br> 5<br> 10<br> ?
Marta_Voda [28]

Answer:

1/2

Step-by-step explanation:

5 0
2 years ago
I need help..................
Angelina_Jolie [31]
1.0 2.39 3.3 4.-17 5.. 15 6. -24 7. 43 8. 39 9. -11 10.-17
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3 years ago
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PLEASE HELP Which ordered pair is a solution to the system of inequalities?<br> y&lt; 3x<br> y&lt; 5
dimaraw [331]

Answer:

I am pretty sure that it is  C

Step-by-step explanation:

A 1,3 so 3 < 3 no not true

   x,y

B -12,50   50< -36 Also not true

    x  ,  y

C  9  ,  4   4<27 Yes    4< 5 YEPPP

D 4,10   10<12 Yes          10<5 NOOPPPPPEEEE

5 0
2 years ago
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