ib trig question!!! HELP NEEDED!!! THANK YOU!!

luciaaa

New member
Joined
Aug 9, 2019
Messages
4
The question is in the file! Plzzz help me out! I've literally been working on this question for half an hour...
Thanks a lot!

Screen Shot 2019-08-09 at 11.35.25 PM.png
 
Last edited by a moderator:

Subhotosh Khan

Super Moderator
Staff member
Joined
Jun 18, 2007
Messages
18,572
The question is in the file! Plzzz help me out! I've literally been working on this question for half an hour...
Thanks a lot!

View attachment 13192
If I were to do this problem:

1) A + B + C = 180 ............. so sin(A) = sin(B+C)

2) attack Left-hand-side and simplify the numerator and continue.......
 

luciaaa

New member
Joined
Aug 9, 2019
Messages
4
If I were to do this problem:

1) A + B + C = 180 ............. so sin(A) = sin(B+C)

2) attack Left-hand-side and simplify the numerator and continue.......
thanks!! But I still can't seem to get the answer. I don't know what to do with the right hand side...
 

Subhotosh Khan

Super Moderator
Staff member
Joined
Jun 18, 2007
Messages
18,572
thanks!! But I still can't seem to get the answer. I don't know what to do with the right hand side...
Leave the RHS alone for the time being continue to simplify LHS. Tell us what do you get.
 

luciaaa

New member
Joined
Aug 9, 2019
Messages
4
Leave the RHS alone for the time being continue to simplify LHS. Tell us what do you get.
I reached cosBcosC=sinBsinC, but I don't know what to do after this. I put tanB as sinB/cosB to get this.
 

luciaaa

New member
Joined
Aug 9, 2019
Messages
4
Leave the RHS alone for the time being continue to simplify LHS. Tell us what do you get.
Never mind, I got the answer!! Turns out i was doing it right all along, except that i forgot an essential formula. Thanks again for your help, i really needed it:D
 
Top