Answer:
in order:
Step-by-step explanation:
 
        
             
        
        
        
Answer:
<u>a = 60° or π/3</u>
Step-by-step explanation:
<u>Given :-</u>
sin² a/2 - sin a/2 + 1/4
<u>To find :-</u>
a
<u>Solving :-</u>
sin² a/2 - sin a/2 + 1/4 = (sin a/2 - 1/2)² = 0
sin a/2 - 1/2 = 0
sin a/2 = 1/2
a/2 = 30°
<u>Solution :-</u>
<u>a = 60° or π/3</u>
 
        
             
        
        
        
Answer:
Step-by-step explanation:
X+7 < 12
 
        
             
        
        
        
Answer:
This is an percentage change question, by any chance you have a maths textbook, look for units that contains the topic: Percentage Change. Now, let's get solving! :) 
Step-by-step explanation:
Firstly, you must multiply 4.5% with 56. That is: shipping fees x purchase price 
That gives ($) 2.52 (this is your answer) 
No addition/totaling needed as the question  asked ONLY for the shipping fees. 
 
Stay safe and Merry Christmas! :) 
 
        
             
        
        
        
Answer:

Step-by-step explanation:
