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3 votes
1 cosect ------------- = s 1 - cosect

User Xamox
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1 Answer

5 votes
s=1+csc t /1-csc t
ds/dt =(1-csc t) (1-csc t cot t) - (1+csc t) (1+csc t cot t) / (1-csc t)²
User PierreN
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