Math , class 10 th , ch-9. 1 , height & distance pdf

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https://drive.google.com/file/d/1VaZrhb5utctqzcC84CWp6ty-0Uro2uun/view?usp=drivesdk
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Trigonometric raios are used to find the height and distance of aobject .
  Its also uses to find the speed , time to reach a ship to a point  and also many type of angle related measurement can be found by trigonometry .
Sir george everest in 1856  invented a moving telescope by which he had measured the height of the heightest  peak , and therefore the heightest peak is named as The everest .
 

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