Answer:
-sqrt(3)/2
Step-by-step explanation:
Use double angle identity for sin(2x)
sin(2x)=2sin(x)cos(x)
We are given sin(x)=-1/2 so we already have so far that:
sin(2x)=2(-1/2)cos(x)
sin(2x)=-1*cos(x)
We just need to find cos(x).
x is in the fourth quadrant so cosine will be positive there
knowing the unit circle we should know that if sin(x)=-1/2 then cos(x)=sqrt(3)/2 while in 4th quadrant.
So the answer is sin(2x)=-1*sqrt(3)/2=-sqrt(3)/2
Answer: I am 90% sure the answer the answer is C but it might be D
If I’m wrong sorry but good luck!
Answer:
1/12
Step-by-step explanation:
Probability of 4 = 1/6
Probability tail = 1/2
Multiply them
The percentage that the family reduce the total utility cost is 25%.
<h3>Utility cost percentage:</h3>
Using this formula
Percentage=Cable Tv/ Total utility cost
Where:
Cable TV=$105
Total utility cost=$420
Let plug in the formula
Percentage=$105/$130+$150+$65+$75
Percentage=$105/$420
Percentage=0.25×100
Percentage=25%
Inconclusion the percentage that the family reduce the total utility cost is 25%.
Learn more about utility cost here:brainly.com/question/24719924
I would say either B or D because they’re both the same equation