Use the sine rule in any triangle
What's the sine rule?
a/Sin A = b/Sin B = c/Sin C
Sin A/a = Sin B/b = Sin C/c
Where side a is opposite angle A, side b is opposite angle B, side c is opposite angle C.
What do we use it for?
The Sine Rule is a more advanced formula that be used to find missing sides and angles in any triangle, whether it has a right angle or not.
When can we use it?
You will be given a side and its opposite angle.
If you are a given another side, you can calculate its opposite angle using the Sine Rule.
If you are given another angle, you can calculate its opposite side using the Sine Rule.
For example
[picture missing]
We know:
a = 4cm
A = 40^{o}
b = 3cm
What is B?
4/40 = 3/B
Rearrange this to get
B = 3 x 40/4 = 30
Nothing in this section yet. Why not help us get started?
Related Topics
Requires a knowledge of…
After this move on to…
Related Questions

1Vote4Answers

1Vote3Answers

1Vote2Answers

1Vote3Answers

0Votes4Answers

0Votes1Answer

0Votes1Answer

0Votes2Answers

0Votes1Answer