# Law Of Sines

• Apr 29th 2013, 09:41 PM
boltage619
Law Of Sines
Using Law of Sines for the ambiguous case: SSA :

Given the triangle with the following sides: A = 25 degrees, a = 8 cm, and b = 15cm , we begin by drawing a "vague triangular diagram":

Step 1: Find the value of h ( this determines how many triangles you will have) :

Step 2: Draw in the side, a, to make an acute angle at B and darken in this triangle.

Step 3: Using Law of Sines, find the missing sides and angles of this triangle :

B1 =

C1 =

c1 =

Step 4: Now you will draw a second triangle below, making an obtuse angle at B. Now find the values of the missing side and angles of this triangle:

B2 =

C2 =

c2 =
• Apr 29th 2013, 11:31 PM
Prove It
Re: Law Of Sines
Have you tried anything yet?
• Apr 30th 2013, 08:46 AM
boltage619
Re: Law Of Sines
No, i don't understand how to do this at all... Lol
• Apr 30th 2013, 09:08 AM
HallsofIvy
Re: Law Of Sines
Then I would recommend you talk to your teacher about this "vague triangular diagram". It should NOT be "vague" and that seems to be your basic difficulty- that you do not know the basic conventions, diagrams, and definitions.
• Apr 30th 2013, 06:14 PM
Prove It
Re: Law Of Sines
Just to get you started - by convention, we use capital letters to denote the vertices/angles of a triangle, and lowercase letters to denote the side lengths. We also use the same letter for sides and angles that are opposite each other, so side "a" is opposite angle "A", etc.