CBSE Class 10-Mathematics: Chapter –9 Some Applications of Trigonometry Part 14
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Question 26:
The angle of elevation of the top of a tower as observed from a point on the ground is and on moving ‘a’ meter towards the tower. The angle of elevation is prove that height of tower is
Let AB B Tower and Height of Tower
Answer:
Let b tower and height of tower
In ,
In
Question 27:
A TV tower stands vertically on a bank of a canal. From a point on the other bank of a canal. From a point on the other bank directly opposite the tower, the angle of elevation of the top of the tower is from a point away from this point on the same back the angle of elevation of the top of the tower is . Find the height of the tower and the width of the canal.
A TV Tower Stands Vertically on a Bank of a Canal
Answer:
Let h be the height of tower and be the width of the river
In
In
Equating (i) and (ii),
Put in (i),