Differentiate the function.r(t) = (cot t)i + (csc t)j
A. r'(t) = (sec2 t)i + (tan t sec t)j
B. r'(t) = (-csc2 t)i - (cot t csc t)j
C. r'(t) = (-sec2 t)i - (tan t sec t)j
D. r'(t) = (csc2 t)i + (cot t csc t)j
Answer: B
Mathematics
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