anonymous
  • anonymous
If sin A = 15/17, What is the measurement of ∠Α and ∠B ?
Trigonometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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jim_thompson5910
  • jim_thompson5910
sin A = 15/17 arcsin(sin A) = arcsin(15/17) ... apply the arcsine function to both sides A = 61.927513 ... use a calculator (this is approximate)
jim_thompson5910
  • jim_thompson5910
I'll let you compute angle B
anonymous
  • anonymous
Ok how would i compute this without a TI Calculator?

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jim_thompson5910
  • jim_thompson5910
with a table is your next best bet
anonymous
  • anonymous
Thats my issue with understanding these questions
jim_thompson5910
  • jim_thompson5910
you can't do something like this by hand
jim_thompson5910
  • jim_thompson5910
I'd use a calculator if you can
anonymous
  • anonymous
ok
jim_thompson5910
  • jim_thompson5910
keep in mind that arcsin is the same as \(\large \sin^{-1}\) or inverse sine
anonymous
  • anonymous
ok, that i am not familiar with. I just got help with cos and tan.
jim_thompson5910
  • jim_thompson5910
if you have a TI calculator, the inverse sine is found by hitting 2nd, then the sine button
anonymous
  • anonymous
oh i dont have one
anonymous
  • anonymous
using a regular calculator
jim_thompson5910
  • jim_thompson5910
ok you can use google as a calculator type "arcsin(15/17) in degrees" without quotes into google to get https://www.google.com/search?q=arcsin%2815%2F17%29+in+degrees&ie=UTF-8
anonymous
  • anonymous
Oh ok thank you.
anonymous
  • anonymous
Let me work this out i will come back and see if i did it right
anonymous
  • anonymous
to get the measure of angle B = arcos(15/17) = arcsin(8/15)
jim_thompson5910
  • jim_thompson5910
it's arccos and not arcos
anonymous
  • anonymous
oh sorry
jim_thompson5910
  • jim_thompson5910
that's ok
anonymous
  • anonymous
but am i correct for 8/15
jim_thompson5910
  • jim_thompson5910
and arcos(15/17) = arcsin(8/15) is simply not true at all
anonymous
  • anonymous
Oh ok i will try again
jim_thompson5910
  • jim_thompson5910
if you meant arccos(15/17) = arcsin(8/17), then you are correct
anonymous
  • anonymous
for my answer i got 25.20
jim_thompson5910
  • jim_thompson5910
for which one again?
anonymous
  • anonymous
for angle B
jim_thompson5910
  • jim_thompson5910
close, but it's a bit smaller than it should be
jim_thompson5910
  • jim_thompson5910
hint: A+B = 90
anonymous
  • anonymous
oh dang it..
jim_thompson5910
  • jim_thompson5910
A and B are complementary angles
anonymous
  • anonymous
Oh i see where i went wrong. Let me try again.
anonymous
  • anonymous
Ok i think i got it now, The measure of angle B=28.07
jim_thompson5910
  • jim_thompson5910
yes approximately
anonymous
  • anonymous
Thank you.
jim_thompson5910
  • jim_thompson5910
you're welcome

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