Trigonometry is a branch of pure mathematics which goes long way back in
history and which is also utilized in complex mathematical concepts that
incluede geometry.
For the O/L mathematics syllabus we only have the basics of trigonometry.
First of all lets identify the 3 main trigonometrical ratios. They are,
1.) sine
2.) cosine
3.) tangent
For the O/L exam we only have to learn about these ratios about a right
angled triangle.
In the diagram show above the angle C is denoted by theta.
In the O/L syllabus the definitions of trigonometrical ratios are
simplified so that the students could get a better understanding about them.
For the angle theta the trigonometrical ratios can be defined as follows,
Generally we can identify that sin ratio of an angle is the ratio
between the length of the oppsite side and
the hypotneuse relative to the angle. The cosine ratio of an
angle is the ratio between the length of adjacent side and the hypotaneuse
relative to the angle. The tan ration of an angle is the ratio between
the length of opposite side and the adjacent side relative to the angle.
We can see that,
therefore,
Written by : Uncle
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tks.this will be a help to improve our English too!
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