Answer:
B) sin Ф
Step-by-step explanation:
Use the pythagorean identity for cos and tan
tan  =  Multiply both sides by cos
     Multiply both sides by cos
sin Ф = sin Ф
If this answer is correct, please make me Brainliest!
 
        
             
        
        
        
Answer:
See the image for solution.
Brainlist please
 
        
                    
             
        
        
        
Answer:
r = 2x + 7
Step-by-step explanation:
get r on one side
8x + 12 + 16 = 4r
divide both sides by 4 to get r by itself
8x/4 + 12/4 + 16/4 = 4r/4
2x + 3 + 4 = r
2x + 7 = r
or 
r = 2x + 7
 
        
             
        
        
        
Answer:
Hello! Here is your answer
Step-by-step explanation:
112=4(28)
a=4b
You can only have one variable so:
Combine b to a:
a-b=84
4b-b=84
Divide both sides by 3:
3b/3=84/3
b=28
But that is not it:
Sum of both cards:
a+b
a=112
b=28
112+28=140
           = 140
I hope I was of help.  If not please let me know! Thank you! Good luck!
 
        
             
        
        
        
2x-x=-13+5
x=-8
I think so 
Good luck