Lizwi Posted November 4, 2019 Posted November 4, 2019 (edited) Quote Why is s ranging from r - R to r + R, can anyone show me me which distance is r -R and which one is r+R Edited November 4, 2019 by Lizwi
Davide Posted November 4, 2019 Posted November 4, 2019 think of R as a clock hand. When R gets to 12 o'clock s = r - R, when R gets to 6 o'clock s r + R 1
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