Cross multiply the expression so that we can get
(1+sinx)(1-sinx) = cos^2 x
1 - sin^2 x = cos^2 x
cos^2 x + sin^2 x = 1
since
cos^2 x + sin^2 x = 1 
therefore 
1 = 1
the two expressions are identical in a trigonometric sense
        
             
        
        
        
The unit rate would be 11/2. Hope this helped.
        
             
        
        
        
Step-by-step explanation:
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Answer:
bc is 26
Step-by-step explanation: