3Tvwo §6.2 / 3Thavo §6.3

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

Tvwo §6.2/ Tvwo §6.3 Calculating with the tangent

First we make a comparison!

Compare:

All the right-angled triangles from §6.1 (vwo)/ §6.2 (havo)  to

those of §6.4 (vwo) / §6.3 (havo)

What do you notice?

§6.1 / §6.2 (vwo) ........
§6.2 / §6.3 (havo) ........

Answer:

In §6.1/§6.2 all triangles are drawn with one of the shorter sides as its base (so horizontally):

 In §6.2/§6.3 this is not the case.

Homework time!

Later we will continue this LessonUp.

In this § you have made...

some exercises, calculating lengths, using the tangent.

But did you notice a difference in them?!

See next slide!

Explication about Method p.198 (vwo) / p.208 (havo), part 1:

so, a x 1 = 5 x 15  or

a = 75

5=​15​​a​​

​1​​5​​=​15​​a​​

Explication last slide, part 2:

If you have this:  

  

You may rewrite is as: 

Here is another simple example:

Do you see that you the '5' and te '10' may change places?

4=​a​​24​​

a=​4​​24​​

10=​5​​50​​

5=​10​​50​​

Homework time again!

Finish these fascinating exercises now!

But first: the Joke of the Day!