# 3Thavo §6.2 Tangent

§6.2 Tangent
= Homework for today.

Let's see what the  'Tangent' of an angle means,
repeating a bit of §6.1 along the way.
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Slide 1: Slide
WiskundeMiddelbare schoolhavoLeerjaar 3

This lesson contains 15 slides, with interactive quiz and text slides.

Lesson duration is: 50 min

## Items in this lesson

§6.2 Tangent
= Homework for today.

Let's see what the  'Tangent' of an angle means,
repeating a bit of §6.1 along the way.

#### Slide 2 -Slide

Summarizing:
+  The Gradient of an angle and
+ The Tangent (tan) of an angle
+ are completely the same things!

#### Slide 3 -Slide

Homework time.
This LessonUp will be continued...

#### Slide 4 -Slide

In exercise 9d we read something new!

#### Slide 5 -Slide

This expression is used when you
+ know the tangent (or gradient) and now
+ you want to know the angle that corresponds to it
+ you key in: SHIFT    TAN   0.625   =
+  the result will be the angle: 32 degrees,
+ just like you should have measured at 9c!

#### Slide 6 -Slide

Here is the explanation from the book:

#### Slide 7 -Slide

What (minor) mistake does Jonny make?

#### Slide 8 -Slide

Jonny's minor mistake is ...

#### Slide 9 -Mind map

So...
+ Jonny keyed in a rounded number
+ instead of the exact division:

+ by the way: did you notice the BRACKETS, that were used?!
117

#### Slide 10 -Slide

1. Key in Ranita's - not to be confused with Rinata! - input, but now without brackets!
3. What do you notice?

#### Slide 11 -Slide

without brackets you get:
which is wrong....
So: don't forget those handy fellows!
Because this really would a major mistake.

#### Slide 13 -Slide

Homework time again.
Let's continue on the fascinating path of Maths!

Math Path.