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Portable Network Graphic  |  1993-02-04  |  1KB  |  512x342  |  1-bit (2 colors)
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OCR: Solution: (This is a straightforward related rate problem) Form Fig. 10.3 (b), we see that: tan 0 = 4 , so that x = h tan e Differentiating with respect to time, dx = h sec20 dt