**News Alert:**Experts Exchange Confirmed as Safe in Cloudbleed Leak Read More

Solved

Posted on 2011-09-19

Find a vector equation of the line tangent to the graph of r(t) at the point P on the curve:

**r**(t) = (2t-1)**i** + sqrt(3t+4)**j** ; P(-1,2)

The answer I got was:

**T**(t) =

**r**'(t) / || **r**'(t) || =

<2, 3/2(3t+4)^(-1/2)>

/

sqrt(4 + ( 9 / (12t + 16) )

Not sure if the above is right. First time my professor said it was wrong, then claimed it was right, but when asked a third time to see if it really was, never got a clear answer so I'm confused.

The answer I got was:

<2, 3/2(3t+4)^(-1/2)>

/

sqrt(4 + ( 9 / (12t + 16) )

Not sure if the above is right. First time my professor said it was wrong, then claimed it was right, but when asked a third time to see if it really was, never got a clear answer so I'm confused.

2 Comments

>>Not sure if the above is right

It looks like you have calculated the unit vector

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Title | # Comments | Views | Activity |
---|---|---|---|

Forces on a string | 9 | 59 | |

Formatting Rounded Math Output in Visual Basic VS2015 | 4 | 40 | |

Sampling | 3 | 51 | |

Calculating T-SCORE inside Excel. | 3 | 139 |

Join the community of 500,000 technology professionals and ask your questions.