B

τ for the space curve r

=left parenthesis 5 Bold cos t right parenthesis Bold i plus left parenthesis 5 Bold sin t right parenthesis Bold j plus left parenthesis 12 t right parenthesis Bold k

(5 cosisinjk

T

sinicosjk

N

 cosisinj

B

=left parenthesis nothing right parenthesis

i

+left parenthesis nothing right parenthesis

j

+left parenthesis nothing right parenthesis

k

 

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