find a tangent vector of unit length at the point with the given value of the parameter t. r(t) = 2 sin(t)i + 5 cos(t)j t = /6

Dna is a polymer of which consist of a sugar, a phosphate group, and a a. amino acids; nucleotide b. nucleic acids; nucleotide c. nucleotides; nitrogenous base d. nucleotides; nucleic acid e. proteins; nucleotide