This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: (a) sin z = 2 i (b) cos z = √ 2 (c) cos z = i sin z 6. Find the domain of analyticity of the given function and compute its derivative. (a) f ( z ) = Log( z3 + i ) (b) f ( z ) = Log( z + 4) z 2 + i 7. Find a branch of log( z 25 z + 3) that is analytic at z = 1 and compute its derivative there. 8. Find a branch of log( z 2 + 1) that is analytic at z = 0 and takes the value 2 πi there. Moreover, compute its derivative at z = 0. 9. Find a branch of the function (4 + z 2 ) 1 / 2 that is analytic outside the disc  z  ≤ 2. Bonus Show that the complex function f ( z ) =  z  2 sin ± 1  z  ² , z 6 = 0 , , z = 0 , is diﬀerentiable at z = 0 and that the ﬁrst partials u x ,u y ,v x ,v y of its real and imaginary parts exist and satisfy the CauchyRiemann equations at (0 , 0), but that u x and u y are not continuous at (0 , 0). 2...
View
Full Document
 Spring '10
 JT
 Math, Calculus, Harmonic conjugate

Click to edit the document details