Real and imaginary parts of $\\cos(z)$ - Mathematics Stack …
2016年4月15日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
Solving $\\cos z = i$ for $z$ - Mathematics Stack Exchange
2015年4月20日 · Using this formula to decompose $\cos z = i$ into real and imaginary parts gives the (equivalent) ...
complex analysis - Solving $\cos z = 2$ - Mathematics Stack …
2017年8月2日 · $\begingroup$ $\cos z=2$ iff $\cosh iz=2$. $\endgroup$ – Angina Seng. Commented Aug 2, 2017 at 11:46
What are the zeros of $\\cos z$? - Mathematics Stack Exchange
2017年9月15日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
Proving different conjugates of cos (z) are equal
2016年12月3日 · I am trying to prove that $ \overline {\cos(z)} = \cos(\bar z)$ I have tried this myself but I can't see where I have gone wrong. I'd like to continue to try to prove it using the …
Find the maximum of a |cos(z)| - Mathematics Stack Exchange
2015年5月5日 · The idea is to apply the same technique used in one of the answers of this problem Maximum of $|\sin(z)|$ as $\{z: |z| \leq 1 \} $ Use the identity: $$\vert\cos …
trigonometry - Solving the complex equation $\sin(z) = \cos(z ...
Use angle addition identities and the relations between trig and hyperbolic trig functions. $$\begin{align} &&\sin(z)&=\cos(z)\\ \implies&&\sin(a+bi)&=\cos(a+bi ...
How to find all solutions of $\\cos(z) = 0$, where …
2019年5月12日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
Euler's formula for complex $z$ - Mathematics Stack Exchange
This also proves that $\cos z + i \sin z = (\cos x + i\sin x)(\cos y + i\sin y)^i$. Share. Cite. Follow ...
Cos (z) and Cosh (iz) - Mathematics Stack Exchange
2017年2月27日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …