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why doesn't sin-1(sin(65) x 22/18) work

 Apr 20, 2019
 #1
avatar+28357 
+2

Because sin(65)*22/18 is bigger than 1, and there is no angle whose sine is bigger than 1.

 Apr 20, 2019
 #2
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+1

Thanks, but could you explain how to solve this problem using law of sines?

In triangle PQR m

Solve the triangle (find all missing sides and angles)

Guest Apr 20, 2019
edited by Guest  Apr 20, 2019
edited by Guest  Apr 20, 2019
 #3
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+1

For some reason the info keeps getting cut off, so:

angle p = 65

p = 18

 q= 22

Guest Apr 20, 2019
edited by Guest  Apr 20, 2019
 #4
avatar+28357 
+1

You don’t show the original triangle, so I can only guess that you’ve got the lengths p and q interchanged.

Alan  Apr 20, 2019
 #5
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+1

There is no original triangle, they just say triangle pqr

what we learned is that the side opposite to angle p is is side p (etc.)

Guest Apr 20, 2019
 #6
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+1

Nevermind, the answer was that the triangle was "invalid"

Guest Apr 20, 2019

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