Cos (A-B) - cos (A+B) 
= (cosAcosB +sinAsinB) - (cosAcosB - sinAsinB)
=2sinAsinB
Ans: 4
        
                    
             
        
        
        
e + 1 13/16 = 2 5/16
subtract 1 13/16 from each side
e = 2 5/16 - 1 13/16
borrow from the 2
e = 1 16/16 + 5 /16 - 1 13/16
e = 1 21/16-1 13/16
e = 1 8 /16
e = 1 1/2
 
        
             
        
        
        
Two tailed ..? Lol I haven’t learned this yet but I am taking a guess what two tailed
        
             
        
        
        
14.50 x 2 (2 1/2 hours = 1 hour) = $29.00 + $14.50 (for another 1/2 an hour) = $43.50. Then, divide 14.50 in half for the other 15 minutes that weren't accounted for yet, so: $14.50/2 = $7.25 then add it to our previous total: $43.50 + $7.25 = $50.75 is your answer :) Hope I helped 
        
                    
             
        
        
        
Hi There!
Conversion: 5 carats = 1 gram
Find: How many grams are in 24 carats.
Solution: 24 / 5 = 4.8
Answer: 4.8 carats
Hope This Helps :)