In making a TV commercial, the producer places a spotlight on a building of height 100m to project an image onto the sky. Suppose the direction of projection makes an angle of 32度 with the horizontal and the distance between the image and the spotlight is 40m. Find the angle of elecation &theta of the image from the foot of the building.
refer to the figure:
http://i176.photobucket.com/albums/w188/tonywai123/q14.jpg
F.3 Math~Angle of elevation
2008-04-26 10:54 pm
回答 (1)
2008-04-27 12:17 am
✔ 最佳答案
θ=90-{tan^-1[40sin(90-32)/(40sin32+100)}=74.36°
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https://hk.answers.yahoo.com/question/index?qid=20080426000051KK01496