Step-by-step explanation:
• y2 → -1
• y1 → 5
• x1 → 4
• x2 → -3
very simple, we use the formula sin(a+b)=sinacosb +
sinbcosa and sin(20)=2sinacosa
5pi = 2pi/3+3pi/3,
First, we use sin(a+b)=sinacosb + sinbcosa
sin(5pi/3)=sin(2pi/3+3pi/3)=
sin(2pi/3+pi)=
sin(2pi/3)cos(pi) +sin(pi)cos(2pi/3)
but we know that sin(pi)=
0, and cos (pi) = -1, so sin(5pi/3)=
- sin(2pi/3)
now, use sin(2a)=2sinacosa,
sin(5pi/3)= - sin(2pi/3)= -2sin(pi/3)cos(pi/3)
sin<span>(5pi/3)=
-2sin(pi/3)cos(pi/3)</span>
<span>sin(pi/3)= 0.86,
cos(pi/3)=0.5, finally we have </span>sin<span>(5pi/3)= -0.86 x 0.5= -0.43</span>
Answer:
16302.9432 ft
Step-by-step explanation:
P = 2L + 2W
Where P is the perimeter, L is the length and W is the width
P = 2(1080√30) + 2(500√20) = 16302.9432 ft
For rounding, you look at the number to the right of it.
In this case, it would be 7
because 7 is greater than 5, it is rounded up (remember, 5 and up is round up, while 4 and lower is round down)
So her answer should be 1300
hope this helps
Answer:
-7
Step-by-step explanation:
5-x=12 subtract 5 from both sides to get x alone
-x=7 divide both sides by -1 so that x is positive
x=-7
