Криволинейные интегралы 1 рода.
5)
x' = -2sin 2t, y' = 2 cos 2t, z' = 5
dl = √( 4sin²2t + 4cos²2t + 25 )dt = √29dt
L = ∫ √29 dt | (0, 3π) = 3π √29
6)
x' = 2cos 2t, y' = -2sin 2t, z' = 5
dl = √(4cos²2t + 4sin²2t + 25)dt = √29 dt
L = ∫ √29 dt | (0, 4π) = 4π √29