Question: Find r ' ( t ) for r ( t ) = 3 c o s t i + 2 s i n t j

Find r'(t) for r(t)=3costi+2sintj+(1-t)2k
(A)3sinti+2costj-2(1-t)k.
(B)-3sinti-2costj+2(1-t)k.
(C)-3sinti+2costj+(2t-2)k.
(D)-3sinti+2costj+(2-2t)k.
(E) Other:
Find r'(t) for r(t)=3costi+2sintj+(1-t)2k
(A)3sinti+2costj-2(1-t)k.
(B)-3sinti-2costj+2(1-t)k.
(C)-3sinti+2costj+(2t-2)k.
(D)-3sinti+2costj+(2-2t)k.
(E) Other:
Find r ' ( t ) for r ( t ) = 3 c o s t i + 2 s i

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