Question

In triangle ABC, AB=5cm, BC=3cm and AC=7cm. Find the measure of angle opposite to largest side

Answer 1

law of cosines
\[a^2+b^2-2ab*cos(x) = c^2\]
where a,b are the legs connected to x
so
5^2+3^-2*5*3cos(x) = 49

Answer 2

so you need to use the cosine rule... but hey... why learn when people just give answers

Answer 3

did I give an answer?

Answer 4

if you have microsoft math... just go an use the triangle solver

Answer 5

in pretty sure this is exactly what you did on the last question @campbell_st I can show you if you forgot

Answer 6

great... email me the link..lol...

Answer 7

anyway @Varu do you get whats going on so far?

Answer 8

yup

Answer 9

but at least it contained an explanation... which aids learning...

Answer 10

I was getting to that until I was interrupted....

Answer 11

I explained just as much as you...

Answer 12

then what is the answer ?

Answer 13

is the answer sq. root of 49

Answer 14

@campbell_st since you like to point out that I am not using correct terminology can you please finish what you started? we all know you are the MATH so why should anyone else help. god forbid they say the angle that has the lines connected to it so that the user will understand .....

Answer 15

I have an answer
For me the answer is 60 degree

Answer 16

Law of Cosine
Cos(B)= a^2+c^2-b^2/-2ac

Answer 17

make sure you check with @campbell_st before you say anything

Answer 18

why me... I'm in 8th grade... not university

Answer 19

I don't like it when I see people telling others how they're giving answers. I mean sure it's not the greatest of things to do and when someone does so then one can PM the person and tell them that they shouldn't reveal answers. However, this should only be the case when the person does indeed reveal answers immediately however this wasn't the case here. @zzr0ck3r only showed the approach to solve the question so the OP can do the question him/herself..

Answer 20

the op told me in private I used the wrong terminology, then told me I must be in 8th grade for explaining it like that...the op @campbell_st is a fluttering retriceole

Answer 21

lol

Answer 22

I still don't know what fluttering retriceole is... even after googling it

Answer 23

yep

Answer 24

@campbell_st Study Oblique Triangles .

Answer 25

ok... well maybe we'll study them next year

Answer 26

guys chill

Answer 27

lol.. this is just to funny... how old are you zz I'm 14...

Answer 28

WEre the same Im 14 too But I already know that Topic

Answer 29

ok....I'll not comment

Answer 30

Because the best thing in doing math Is to study it by yourself

Answer 31

but I do need to know what a fluttering retriceole is... the only google reference is open study

Answer 32

ok... thanks for being such a polite person and telling me good luck with your studies

Answer 33

\[Cos (B) = a ^{2} + c ^{2} - b ^{2}\div-2ac\]

Answer 34

formula for getting the Angle B