In ∆ABC, what is the value of cos B? a) 5/4 b) 3/4 c) 3/5 d) 4/5 e) 4/3

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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
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do you know what ratio the cosine function represents?
I forgot what it was... tbh.... I'm really horrible at math... and i couldn't catch on to it...

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Other answers:

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

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