anonymous
  • anonymous
In ∆ABC, what is the value of cos B? a) 5/4 b) 3/4 c) 3/5 d) 4/5 e) 4/3
Geometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Sepeario
  • Sepeario
do you know what ratio the cosine function represents?
anonymous
  • anonymous
I forgot what it was... tbh.... I'm really horrible at math... and i couldn't catch on to it...

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More answers

Sepeario
  • Sepeario
Don't worry :) I can help you. Have you heard of SOH CAH TOA before?
anonymous
  • anonymous
no i havent, my teacher never taught me that
Sepeario
  • Sepeario
It essentially means \[\sin=O/H, \cos=A/H, \tan=O/A\]
Sepeario
  • Sepeario
it's a mnemonic worth remembering for trigonometry.
anonymous
  • anonymous
oohhh
Sepeario
  • Sepeario
so if cos = adjacent/hypotenuse, do you know which to sides these are in relation to angle b?
anonymous
  • anonymous
adjacent and hypotenuse?
anonymous
  • anonymous
@Sepeario
Sepeario
  • Sepeario
yes but which sides are they in the above triangle?
anonymous
  • anonymous
3 and 5??
anonymous
  • anonymous
right?
anonymous
  • anonymous
@Sepeario
Sepeario
  • Sepeario
yep, so the final ratio is?
anonymous
  • anonymous
wait how would i put that in my calculator?
anonymous
  • anonymous
i'm so sorry i literally forget so much stuff it's a problem....
anonymous
  • anonymous
@Sepeario
Sepeario
  • Sepeario
you can't really put that into a calculator. so what is the final answer?
Sepeario
  • Sepeario
if adjacent = 3 and hypotenuse = 5 and cos 60 = a/h = ?
anonymous
  • anonymous
frig..... um....
anonymous
  • anonymous
it's 3/5??
anonymous
  • anonymous
sorry i'm so tired and i have 6 online geometry tests to do by 1:18 p.m and its 8:21 a.m
anonymous
  • anonymous
so is it 3/5 @Sepeario
Sepeario
  • Sepeario
yep that's right
Sepeario
  • Sepeario
good luck! and i'm sure you'll do well.
anonymous
  • anonymous
i suck at math
anonymous
  • anonymous
i'm gonna fail and have to repeat freshman year

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