## Saturday, 23 August 2014

TRIGONOMETRY RATIOS & PERCENTAGES......
THE RELATIONSHIP BETWEEN THEM.

Imagine a stick casting a shadow on a wall.
Now the stick keeps changes its angle....the length of the shadow changes.
At 60 degress..... the length reduces by root of ( 3/2) times....i.e by 0.866 times.
At 30 degrees.....the length reduces to half.

Similarly.......a table for Cos can be made

NOTE :                                                                                   Actually......every ratio when multiplied by 100 gives a percentage.
To give an example.....when someone says that 2/3rd o the earth is covered with forests,......simply multiply 2/3 by 100 and you will get 66%.
Thus 2/3 means 66%.
SIMILARLY ..... .
1/2 means 50%
1/4 means 25%
1/5 means 20%
So if you have problem visualizing ratios and fractions (like me).....just multiply by 100 and get the percentage form. That may help you visualize things better.
At any time for me atleast saying that 20% of something is far more intuitive than saying 1/5th.
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#### 1 comment:

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