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Trig

 Apr 30, 2019
 #1
avatar+103948 
+2

10.9^2  =  5.8^2 + 10.5^2  - 2(5.8)(10.5) cos θ

 

 ( 10.9^2 - 5.8^2 - 10.5^2)  / [ -2(5.8)(10.5) ]  = cos θ

 

Cupcake......I get  that   cos  θ   ≈  .21

 

https://www.wolframalpha.com/input/?i=(+10.9%5E2+-+5.8%5E2+-+10.5%5E2)%C2%A0+%2F+%5B+-2(5.8)(10.5)+%5D

 

 

cool cool cool

 Apr 30, 2019

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