10k^4+10k^3+8k^2+8k+10/k+1 not sure if this is what you are looking for or not hope it helps
        
             
        
        
        
Answer:
(a)  
         
(b) L reaches its maximum value when θ = 0 because cos²(0) = 1
Step-by-step explanation:
Lambert's Law is given by:
 (1)
   (1)
(a) We can rewrite the above equation in terms of sine function using the following trigonometric identity:

 (2)
  (2)
By entering equation (2) into equation (1) we have the equation in terms of the sine function:
 
         
(b) When θ = 0, we have:
 
  
We know that cos(θ) is a trigonometric function, between 1 and -1 and reaches its maximun values at nπ, when n = 0,1,2,3...
Hence, L reaches its maximum value when θ = 0 because cos²(0) = 1.
 I hope it helps you!
 
        
                    
             
        
        
        
Answer:
what?Can you write better?