Grade 10 IB - Math - Trig

What is the main concept of trigonometry to relate angles with sides of a triangle?

So if 1:2 (left to bottom) triangle has the same angle as a 4:8 triangle (left to bottom), - then what might we say trig is all about?

What are the main 3 trig "ratios" called? (*looks at calculator*) And how do you pronounce them?

There are 3 more trig ratios that you will need to know in the future... can you remember what their names are, and how to 'make them'?

So if trig is RATIOS OF SIDES of TRIANGLES, then what are - cos, sin and tan doing in the mix?

What are cos, sin and tan ratios then?

How do you know which part of the triangle is O, A or H ????
(What is O, A and H again?)

PRACTICE TIME:
1. Label O, H and A
2. Which trig ratio is biggest in this triangle?
Hint: you are standing at the bigger angle (not 90)

What is the requirement to use all SOH CAH TOA ratios?

**What is the assumption you make when you use Sin, Cos, Tan?

Tan is just a poser.
It doesn't have it's own personality.
Why would I say that?

PRACTICE:
What is the secret trick to this triangle? (Why can't we use normal SOH CAH TOA here?!)

Imagine angle K is 20 degrees. What is the AREA of this triangle? Base is 10m long.

PRACTICE: Tricky!

Sin(x) = 5/8

What is the 30 degrees, 60 degrees, 90 degrees triangle to memorize?

What is the 45 degree triangle to memorize?

What should I remember when labelling an angle from a word problem?

How do I know what is opposite and adjacent labels on the triangle?

	Created by Lauren Jatana about 9 years ago

Flashcards on Grade 10 IB - Math - Trig, created by Lauren Jatana on 29/10/2015.