Trigonometry Question!?

Posted on 2015-12-01 06:57:00 in Math by JONATHAN

Two apartment buildings 100m and 80m high are 60m apart (refer to picture). The sun casts a shadow of the 100 m building on the 80m building: 



a) If the angle of elevation of the sun is 22°, calculate the height of the shadow of the 80 m building to the nearest meter. 



b) If the angle of elevation of the sum changes at a constant rate of 15°/hr, calculate the total time that the 80 m building is partly in the shadow of the 100 m building.

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