## anonymous one year ago Trig/ Law of Sine/ SSA / How does this have two angles? Drawing coming up and details

1. anonymous

|dw:1434480732936:dw| a=7 b=5 A=70 I know how we get B, which is sin B 5sin 70 / 7 which is 42.20 but what or how to we get the second B ?

2. anonymous

The line in the center is h

3. geerky42

What do you mean by "second B"?

4. anonymous

$$\frac{5\sin 70}{7} = B_1 = 42.20$$ Now they stat there is a $$B_2 = 137.80$$ but I do not know where that is coming from

5. geerky42

So you are looking for a reason why $$B_2 = 137.80$$? Can you label $$B_2$$? Where is it in triangle you sketched?

6. anonymous

that is not labeled.

7. anonymous

They stat there are two angles for B 0 < B < 180

8. anonymous

They stat there are two angles B 0 < B < 180, for which sin B = $$\frac{5\sin 70}{7}$$= 42.20

9. anonymous

First angle is 42.20 how to find the other?

10. anonymous

Ah I got it HAHAHA

11. geerky42

That's good then. We don't know what second angle is referred to...

12. anonymous

To find the other angle we do 180 - 42.20

13. anonymous

That is how you get the second angle when doing SSA