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:
-5.6 is the answer if you solve it. i think
Step-by-step explanation:
The six dollars for eight ounces is the cheaper one.
you have to find the common denominator between 5 and 8, the simplest I thought of was forty so to get the eight to forty, you multiply by five and six times five equals thirty and you do the same for the other one except it's times eight for this one so it'll equal thirty two, so there isn't much difference (two) but the first bottle has the lower unit rate
2 x minus 5 y = negative 5. y = two-fifths x + 1.
