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Two sides of a parallelogram are 30 and 20.  One diagonal has a length of 40. What is the length of the other diagonal?

 Mar 15, 2022
 #2
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hi  hlep me with math

 Mar 15, 2022
 #3
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Two sides of a parallelogram are 30 and 20.  One diagonal has a length of 40. What is the length of the other diagonal?

 

Use the cosine rule to find cos(theta)   then get back to me.      [ note:I want cos(theta), not  theta ]

 

If you have cos(theta), what is the value of cos(180-(theta)) ?\(\)

 

 

 Mar 16, 2022
edited by Melody  Mar 16, 2022

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