Please guys need help asap.

918 Find the unit tangent vector of the Given curve r(t ) = ( 6+1943 ) + (4+ 243 ) ;+ (6+1073 ) k BibT Dig: Find the curvature K dFor the given function. ret) = ( 5+ Aint+ 5 cost ) i + 5)+ ( 5 +cost- ssint)K