Answer:
0.8660
Step-by-step explanation:
cosine theta = -1/2
theta = cosinearctan(-0.5)
theta = 120
sine4theta = sine 4(120)
                    = sine480
                   = 0.8660
 
        
             
        
        
        
Answer:
f(x)  = (1/x) - 5
g(x) = x^2 + 2
=> f[g(x)] = [1/(x^2 +2)] - 5
 
        
             
        
        
        
Answer: 1/8 is left over. 
Step-by-step explanation:
Tess already at half of the pizza, and Shawn ate a quarter of the pizza. 
1/2 + 1/4= 3/4
There is a quarter of pizza remaining, but Molly ate half of that quarter (1/8). There is only 1/8 of pizza left. 
 
        
                    
             
        
        
        
The y-coordinate of c is -4 if the Point c partitions line segment AB in the ratio of 1:3.
<h3>What is a straight line?</h3>
A straight line is a combination of endless points joined on both sides of the point.
We have two points:
A(-4, -7), and B(12, 5)
Let's assume A(x1, y1)  and B(x2, y2)
The ratio is 1:3 = m:n
Let's assume the y-coordinate is a
From the section formula:

 
a = -4
Thus, the y-coordinate of c is -4 if the Point c partitions line segment AB in the ratio of 1:3.
Learn more about the straight line here:
brainly.com/question/3493733
#SPJ1
 
        
             
        
        
        
18 chocolate cakes were made. 40(3)= 120 cakes in total. 15%=.15 .15(120)= 18