Answer:
 sin(A-B) = 24/25
Step-by-step explanation:
The trig identity for the differnce of angles tells you ...
 sin(A -B) = sin(A)cos(B) -sin(B)cos(A)
We are given that sin(A) = 4/5 in quadrant II, so cos(A) = -√(1-(4/5)^2) = -3/5.
And we are given that cos(B) = 3/5 in quadrant I, so sin(B) = 4/5.
Then ...
 sin(A-B) = (4/5)(3/5) -(4/5)(-3/5) = 12/25 + 12/25 = 24/25
The desired sine is 24/25.
 
        
             
        
        
        
Answer:
yes you may use the answer will be 100% correct
 
        
             
        
        
        
Always do brackets first 
a) -40/10 = -4
b) 36/4 -2 = 7
c) -2 x 7 = -14
        
                    
             
        
        
        
Answer:
n has no value.
There is no solution to this equation
Step-by-step explanation:
let n be the number
In pieces:
 
sum of the number and 1: (n + 1)
8 times the sum: 8(n + 1)
 
-7 times a number: -7n
sum of -7 times and...: -7n + 8(n + 1)
 
number minus 7: n - 7
 
the same as: =
 
All together:
 
-7n + 8(n + 1) = n - 7 
-7n + 8(n+1)=n-7
-7n + 8n+8=n-7
0=-15