Question

PreCalc Question. Picture below :)

Answer 1

I think i'm meant to use the Law of Cosine so I did:
c^2=a^2+b^2-2(a)(b)cos(48.9)
but it comes out to the wrong answer?

Answer 2

did you try the distance formula

Answer 3

No, I didn't. what is that? :P

Answer 4

you are in pre calc right???? okay so the first thing to do is draw it out on paper.... send me that when you do then i can help from there.. im also in pre calc

Answer 5

@16shuston here you go!

Answer 6

is it incorrect?

Answer 7

no it is incorrect.. and the law of cosine only works for right angle instead of a triangle it is just an angle.. i cant draw on my end my phone is being stupid otherwise i's show you

Answer 8

oh, that's handy to know. grr haha technology! Um, so how do I solve it not using cosine?

Answer 9

Because i'd use law of sine but I don't have any pairs.

Answer 10

ya sorry technology is being stupid... grr.. okay so you can't use and law of sin or cosine or even tan.. use the pythagrum theorum

Answer 11

x^2+y^2=c^2

Answer 12

the answer would come out to 616 but it says incorrect D:

Answer 13

@KendrickLamar2014 should be able to help.. or maybe @vera_ewing im sorry i thought it would work :(

Answer 14

Thank you so much anyway! You're a champ :) I would've been ticked if it had worked though because it would have been too simple xP

Answer 15

haha ya no problem.. ill become your fan though, you seem pretty cool

Answer 16

Thanks!

Answer 17

ya

Answer 18

@jim_thompson5910 , @freckles can either of you help? :)

Answer 19

Sorry, I can't help.

Answer 20

Ai, thanks for checking in anyway.

Answer 21

try @acxbox22 maybe they can help

Answer 22

sine rule:

\[ \frac{ \sin A }{CB } = \frac{ \sin B }{ AC } = \frac{ \sin C }{ BA }\]