anonymous
  • anonymous
WILL MEDAL AND FAN! In Triangle ABC, m
Mathematics
chestercat
  • chestercat
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butterflydreamer
  • butterflydreamer
first draw out a triangle and label the information given to you in the question :)
anonymous
  • anonymous
|dw:1433223149189:dw|
anonymous
  • anonymous
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anonymous
  • anonymous
butterflydreamer
  • butterflydreamer
exactlyyy! :) Good Okay so we want to work out the length AB right? So, before we can do this (by using the sine rule) we have to FIRSTLY work out the angle of C. Hint; Angle sum of a triangle = 180 And since we're given the other two angles, angle C = ?
anonymous
  • anonymous
75
butterflydreamer
  • butterflydreamer
yes now we can apply the sine rule since we have two angles and their corresponding sides :) |dw:1433223771770:dw|
butterflydreamer
  • butterflydreamer
Sine rule to find the length of a side is given by the formula: |dw:1433223826060:dw|
anonymous
  • anonymous
So how do I figure that out?
butterflydreamer
  • butterflydreamer
well.. we have this formula: |dw:1433223969779:dw|
butterflydreamer
  • butterflydreamer
also when you plug it into the calculator, remember the question asks for the length of AB to the nearest tenth of an inch... meaning round it to 1 decimal point. Then you're all done :)
anonymous
  • anonymous
Do you know of a online calculator that does that because mine doesn't let me put all that in?
butterflydreamer
  • butterflydreamer
.. you don't have a "sin" button on your calculator? LOL For questions like these, you'll definitely need one of these scientific calculators :) Anyway here is one: https://www.google.com.au/search?q=scientific+calculator+online&oq=scientific+calculator+online&aqs=chrome..69i57.4559j0j7&sourceid=chrome&es_sm=93&ie=UTF-8
anonymous
  • anonymous
I get 10.2 and my calculator has sin but it wouldn't let me put the 75 after.
butterflydreamer
  • butterflydreamer
oh lol.. you're close. remember... if the number after 2 is 5 or above, we round up. SO 2 will become 3. Therefore it will be 10.25 and we round it to 1 dp, therefore 10.3
anonymous
  • anonymous
My choices are 28.5 in 15.6 in 14.1 in 31.2 in What do I do?
butterflydreamer
  • butterflydreamer
oh.. hmm give me a minute.. maybe i did something wrong
butterflydreamer
  • butterflydreamer
i just re-did the question and i still end up with 10.3 in SO maybe you made a typo in the question?
anonymous
  • anonymous
Nope I just double checked it matches exactly with my question.
anonymous
  • anonymous

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