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

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58 Differentiation of Functions [Ch. 2<br />

whence<br />

,_* 2<br />

ay<br />

y<br />

~~axy*'<br />

581. F<strong>in</strong>d the derivative x y if<br />

a) f/ =<br />

c) y = 0.<br />

.dy<br />

In the follow<strong>in</strong>g problems, f<strong>in</strong>d the derivative #'=^<br />

functions y represented parametrically:<br />

582.<br />

583.<br />

584.<br />

585.<br />

586.<br />

587.<br />

588.<br />

t / cos/).<br />

595. Calculate ~ when ^ = 4- if<br />

: = a(t<br />

///i /t cn y a s<strong>in</strong> s<strong>in</strong>/<br />

Solution. -r-~<br />

a(l cosO 1 cos/<br />

f =<br />

589.<br />

590.<br />

591.<br />

592.<br />

593. '<br />

(<br />

x = acos*f,<br />

\ y = b s<strong>in</strong>* t.<br />

x = acos* t,<br />

y=b<br />

8<br />

s<strong>in</strong> 1.<br />

cos 3 /<br />

T^nr<br />

s<strong>in</strong> 8 /<br />

V ?=<br />

coslr<br />

x = arc cos<br />

y<br />

( __ *~ ^<br />

arc s<strong>in</strong><br />

{ y~=e:<br />

* the<br />

= a( In tan + cos ^ s<strong>in</strong> ><br />

-2- ^)<br />

= a(s<strong>in</strong> t + cosO.<br />

s<strong>in</strong> /),<br />

a(l cos/).

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