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Let 2=x+iy be a complex number such that coshz 0. Then Im(tanhz) is equal to * sinhycoshy sinh²x+cos²y the above: sinycosy sinh?x+cos²y the above

Let 2=x+iy be a complex number such that coshz 0. Then Im(tanhz) is equal to * sinhycoshy sinh²x+cos²y the above: sinycosy sinh?x+cos²y the above

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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4:30 1 Classroom Let z=x+iy be a complex number such that coshz +0. Then Im(tanhz) is equal to * sinhycoshy sinh²x+cos²y the above: sinycosy sinh²x+cos²y the above
Transcribed Image Text:4:30 1 Classroom Let z=x+iy be a complex number such that coshz +0. Then Im(tanhz) is equal to * sinhycoshy sinh²x+cos²y the above: sinycosy sinh²x+cos²y the above
Let A be a fixed constant positive number and f be an entire function with the property that |f (z)| < A(\z|² + ]zl) for all complex numbers z. Which among the following is true about f(z)?
Transcribed Image Text:Let A be a fixed constant positive number and f be an entire function with the property that |f (z)| < A(\z|² + ]zl) for all complex numbers z. Which among the following is true about f(z)?
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