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

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


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


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