Prove that sina'=nsinb

  • #1
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Homework Statement


look at the figure and prove that sina'=nsinb. We have given a, b, a', b' and n
http://s32.postimg.org/n7rnu0khx/image.png

Homework Equations


sinb'/sina'=1/n

The Attempt at a Solution


But in the equation we have b, not b'. I made the figure. How would the correct one be?
 

Answers and Replies

  • #2
RUber
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Can you prove that ##\sin b = \sin b'##?
 
  • #3
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Can you prove that ##\sin b = \sin b'##?
No, only if the triangle has 2 equal sides
 
  • #4
RUber
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Are the dashed lines making a and a' forming right angles with the sides of the triangle?
What other information do you have about this problem? How is the interior vector chosen/created?
 

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