A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
I need help for my final exam. It is the IB Mathematics SL Paper Two for 2011. First problem. "The following diagram shows triangle ABC. AB = 7cm. BC = 9cm. And Angle ABC = 120 degrees. I need to find AC and the angle BAC.
anonymous
 5 years ago
I need help for my final exam. It is the IB Mathematics SL Paper Two for 2011. First problem. "The following diagram shows triangle ABC. AB = 7cm. BC = 9cm. And Angle ABC = 120 degrees. I need to find AC and the angle BAC.

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0use law of cosines AC = b AB=a BC = c b^2 = a^2 +c^2  2ac*cos(120); b= 13.892 then use law of sines: sin(ABC)/b = sin(BAC)/c; sin(120)/13.892 = x/9; x= 0.561040853 arcsin(x) = 34.13 degrees = m BAC

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0Although this is reasonably straightforward to visualize, could you attach an image? Scan or take a picture of it so we can see what the triangle looks like.

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0Lol. Or it could get answered lightning fast without that :)

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0Give daniel a medal if you found his answer helpful!

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0(Just click the `Good Answer' button.)

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0To the right of his name, where you see the post above.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.