A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
lilg132
 3 years ago
trigonometry help
lilg132
 3 years ago
trigonometry help

This Question is Closed

lilg132
 3 years ago
Best ResponseYou've already chosen the best response.0i need to work out the length of BC and the phi angle

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.1Law of Cosines: c^2=5^2+8622(5)(8)cos 115.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.1\[(BC)^2=5^2+8^22\times5\times8\cos 115\]

lilg132
 3 years ago
Best ResponseYou've already chosen the best response.0i've been taught just to do (bc)^2 = ac^2 + ab^2

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.1then after you find BC use the law of sines.\[\frac{\sin 115}{BC}=\frac{\sin \theta}{5}\]

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.1this is not a right triangle so the pythagorean theorem does not apply.

lilg132
 3 years ago
Best ResponseYou've already chosen the best response.0i thought i was doing something wrong :p

lilg132
 3 years ago
Best ResponseYou've already chosen the best response.0let me try and do it now thanks for pointing that out
Ask your own question
Ask a QuestionFind 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.