Q2 of 31 Page 117

A ladder leans against a wall, with its foot 2 metres away from the wall and the angle with the floor 40°. How high is the top end of the ladder from the ground?

The question can be figured out as:



Here ladder is forming a right angled triangle with wall and floor,


By using trigonometry,



⇒ h = b × tan40°


⇒ h = 2 × 0.839


⇒ h = 1.678 m


So, top end of ladder is 1.678 m high from ground.


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5

Using the sine and cosine tables, and if needed a calculator, do these problems.

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