Simplification question

  • Thread starter theone
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  • #1
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Homework Statement


Does anyone know what was done to go from the first line to the second?

Homework Equations




The Attempt at a Solution


I don't know what sequence of steps they did after the angle was factored.
I think both sides were then multiplied by [tex]\frac{mls^2}{(M+m)(I+ml^2)}[/tex] or something?
 

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Answers and Replies

  • #2
gleem
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From the original equation get a common denominator, mls2. for all terms. collect terms in s4,s3,s2 and s.
write Φ/U divide the numerator and denominator by the coefficient of the s4 term which is q. DA DA.
 

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