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In  △CDE ,  DE=14 ,  CE=9 , and  m∠E=71∘ .

What is the length of  CD

 Feb 22, 2020
 #1
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In △CDE , DE=c=14 , CE=d=9 , and ∠\(\epsilon =71^o\) .
What is the length of CD=e?

 

Hello Guest!

 

\(e^2=c^2+d^2-2cd\cdot cos(\epsilon)\)        cosine

 

\(e=\sqrt{14^2+9^2-2\cdot 14\cdot 9\cdot cos(71^o)}\)

\(e=13.96269...\)

 

The length of CD is 13.96269...

laugh  !

 Feb 22, 2020

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