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K ATİONS OF TRIGONOMETRY4. A 1.2 m tall girl spots a balloon moving205with the wind in a horizontal line at aheight of 88.2 m from the ground. Theangle of elevation of the balloon fromthe eyes of the girl at any instant is60°. After some time, the angle of /60。...elevation reduces to 30° (see Fig. 9.13).30Find the distance travelled by theballoon during the interval.:88.2 mAiiFig. 9.13 |
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