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Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

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d<br />

$93. ds = dx, cosa = ;<br />

<br />

y<br />

u<br />

Answers 415<br />

where c=- Ka 2<br />

= I/ . 997. ds = cosh dx: cos a =<br />

x tit<br />

6 2 . 995. ds^<br />

s<strong>in</strong> a tanh -. 998. ds = 2as<strong>in</strong>~rff; cos a<br />

(X Z<br />

s<strong>in</strong>--;<br />

Z<br />

s<strong>in</strong> a cos -~- . 999. ds =<br />

Z<br />

~3as<strong>in</strong> ^ cos/ d^; cosa= cos/; s<strong>in</strong> a s<strong>in</strong>/. 1000. ds = a V^l +(p 2<br />

d

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