Thursday, November 16, 2006
posted by S. Tao at 3:56 PM
In today's class we fooled around with 30* triangles using SIN ratio. We drew three 30* triangles (1 small, 1 medium, and 1 big) See pictures below...

Small triangle


Note:
Mrs. Armstrong told us that when using a2 + b 2 = c2 we should use Leg2 + Leg2 = Hyp2 instead, unless it is labeled that way





Medium triangle




Since these are 30* triangles (using Sin) it will have a pattern in the measurements; in other words the hyp will be twice as big as the opp











Large triangle





The adj is effect by the opp of the triangle as you can see through these examples










Relations



Sin : Related to the Y axis

Cos : Related to the X axis

Tan : related to the Y axis divided by the X axis











Here is a chart that will show the relation of the trig ratios









Homework: exercise 18 and the next one to blog is..... Edward
 



2 Comments:


At November 16, 2006 10:11 PM, Blogger dinh

you forgot to link a site

 

At November 16, 2006 10:30 PM, Blogger dinh

It's Leg2 + Leg2 = Hyp2
not Leg2 + Leg2 = Leg2