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anonymous
 3 years ago
Find the norm of vector r prime of t when r(t) = t^2i + 2sintj + 2costk
anonymous
 3 years ago
Find the norm of vector r prime of t when r(t) = t^2i + 2sintj + 2costk

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0r'(t)=? r(t) is given

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so start with taking derivative

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0then square each component , add them

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[\sqrt(4t^2 + 4\cos^2t + 4\sin^2t)\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0What's the trig identity for cos and sin?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so does the second half of that just become 8?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Can you explain? I can never follow this one...

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0cos(t)^2+sin(t)^2=1 4(cos(t)^2+sin(t)^2)=4

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Ohhhh.... Is that technically combining like terms?
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