Sine Law

1
Sine Law

• MPM 2D
• Trigonometry Unit

2

• Lets say we have to solve a triangle that is
  not a right angled triangle.

We can use the Sine Law but first we need to
show how the law is derived!!
3
Sine Law
Rearrange to get bs together and cs together!!
Rearrange each to isolate h
Both equal h substitution!!
Part of the Sine Law!!!!
4

• That was only part of the Sine Law!!
• What if we drew the altitude from B to AC?
• Or using the altitude from C to AB?
• So the complete Sine Law is

5
Now lets use it!!!

• Handout with examples!!