sint/(1-cost)求导

题目详情

sint/(1-cost)求导

▼优质解答

答案和解析

f'(t)=[(sint)'(1-cost)-(sint)(1-cost)']/(1-cost) =[cost(1-cost)-sintsint]/(1-cost) =[cost-(cost+sint)]/(1-cost) =(cost-1)/(1-cost) =1/(cost-1)

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