positon vectors r(t) find the unit tangent vectors T(t) for the given value of t(adsbygoogle = window.adsbygoogle || []).push({});

r(t) = (cos5t, sin5t)

T(pi/4) = ( , )

r(t) = (t^2, t^3)

T(1) = ?

r(t) = e^5t i + e^-1t j + t k

T(2) = ? i+ ? j+ ? k

now the to find it i use r'(t)/lr'(t)l

I did that, but i get wrong answers i dont know what im doing wrong cuz all i c is that is how u find the unit tangent vectors... someone plz help me and explain what u did.. thanks alot!

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# Homework Help: Unit tangent vector (cal 3)

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