Question

evaluate the total chargeQ of a wire if it's density is diastributed along the wire in according with the formula

$q(xyz) = {x}^{2} + sin ^{2} (- 2x)$
and shape of wire is discribe by the parametric equation r
$r(t) = cos2ti + sin 2tj - 2tk$
where t varies from
$\pi \div 4 to 3\pi\4$

$($
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Answer 1

Answere in above picture