In △CDE , DE=14 , CE=9 , and m∠E=71∘ .
What is the length of CD
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...
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+109 
