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I got 31 can someone tell me and show how they got thier answer?

I got 56.8cm

Please help

Guest Apr 10, 2018
 #1
avatar+87714 
+1

First one...we can use the Law of Sines

 

sin R / 30  =  sin 69 / 35       multiply both sides by 30

 

sin R  = 30 sin (69) / 35

 

Use the arcsin to find R

 

arcsin [ 30 sin (69) / 35 ]  =  R  ≈   53.15°  =  53°

 

 

Second one.....

 

Note that angle F  =  180  - 87  - 40  =  53°

 

So...we can use the Law of Sines, again

 

x / sin 87  = 13 / sin 53     multiply both sides by sin 87

 

x  =  13 * sin 87  / sin 53     ≈ 16.25 cm   =  16 cm  (rounded)

 

 

 

cool cool cool

CPhill  Apr 10, 2018

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