Calculating Crane Height from Angles

AI Thread Summary
To calculate the height of a crane on top of a 42-meter building using angles of elevation, the angles measured are 62 degrees to the bottom and 68 degrees to the top of the crane. Using trigonometry, the height of the crane can be determined by calculating the vertical distances from the observer's point to both the bottom and top of the crane. The height from the observer to the bottom of the crane is approximately 42 meters plus the additional height calculated from the 68-degree angle. The final height of the crane can be found by subtracting the building height from the total height derived from the angles. This method effectively combines geometry and trigonometric principles to solve for the crane's height.
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To calculate the height of a crane which is on top of a building, dennis measures the angle of elevation to the bottom and the top of the crane. these were 62 degrees and 68 degrees respectively. if the building is 42 metres high find the height of the crane.

I'm asking for a friend, excuse the English it was sent through an instant message.
He would prefer the answer (and working if possible), thanks! :)
 
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Just give it a try and we will guide you through. Start with making a rough diagram.
 

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