This week we learned some new concepts for trigonometry.

Last year we used SOH CAH TOA

Now we expanded this concept so we could find side lengths and angle of other triangles than right angle triangles.

We also learned about…

• special triangles
• sine law
• cosine law
• reference angles

New formulas we learned…

The biggest concept we learned is sine law and cosine law. There are two different situations where they’re useful.

Sine law is useful when you got a side and its corresponding angle paired with it.  It doesn’t what pair (If it’s not the desired angle or length it’s okay).

Cosine law is useful when we have a side length or an angle but when don’t have both.