Answer
The expression is equivalent to sin^{2}x
The first step is to multiply the two expressions between parentheses :
(II)
There is a trigonometric identity that states :
Working with this expression :
 ⇒
 (I)
Using the equation (I) in (II) :
 ⇒
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Answer:
 1.45934 × 10^5
Step-by-step explanation:
 
        
             
        
        
        
Answer: 
The one with the better deal would be 30 ride tickets for $22.50 this is because you pay less money for more rides. 
Step-by-step explanation:
First you divide 20 by 14. Doing this will give you the cost of a ride per ticket. 
20/14 = 1.42 
Then you do the same thing to 30 and 22.50.
30/22.50 = 1.30
Last you compare which deal has less money per ride. 
1.42 > 1.30
 
        
             
        
        
        
The correct answer to your problem is 96