anonymous
  • anonymous
Need help learning how to apply the law of sines
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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anonymous
  • anonymous
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amistre64
  • amistre64
first off, what is the law of sines tell us?

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anonymous
  • anonymous
that a/sinA is equal to b/sinB equal to c/sinC
amistre64
  • amistre64
right, but i dont see how that would help us in this problem; we only know one angle and one distance ....
anonymous
  • anonymous
what would we use?
amistre64
  • amistre64
id use a tangent myself; but i might see a way for the law of sines to work out ... if need be
anonymous
  • anonymous
104tan(72)?
amistre64
  • amistre64
the angle on the other side of the river is 90 minus the angle on this side: 90-a and we know the distance on this side as: l sin(90-a) sin(a) -------- = ----- l w w = l sin(a)/sin(90-a)
amistre64
  • amistre64
tan(a) = w/l l tan(a) = w yeah
amistre64
  • amistre64
the tangent method is much simpler by far
anonymous
  • anonymous
thank you! you might wanna see my other questions that i'll post in a bit- they're all related to trig

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