Question

Find the arc length of the curve
x = 8et cos 6t, y = 8et sin 6t
where 0 ≤ t ≤ π/2.

Answer 1

i got my dx/dt to be \[-48e ^{t}\sin(6t) +8e ^{t}\cos(6t)\]

Answer 2

and i got my dy/dt to be \[48e ^{t}\cos(6t) +8e ^{t}\sin(6t)\]

Answer 3

-48etsin6t+48etcos6t

Answer 4

what's that for?

Answer 5

what are you getting for your derivatives or your g'(x) and f'(x)?

Answer 6

derivative of x -48etsin6t

Answer 7

derivative of y 48etcos6t

Answer 8

what about the product rule?

Answer 9

:D sorry

Answer 10

lol np