I stumbled across this question while self-learning topology, and I am not sure how to proceed. I need to prove that the image of [tex]f(x)=\cos x + i \sin x[/tex] is the unit circle. The statement is obvious, which makes it all the harder for me to figure out what I actually need to do!(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Prove the image is a circle

Loading...

Similar Threads - Prove image circle | Date |
---|---|

B How to "prove" something in math? | Thursday at 3:14 PM |

How to prove vector identities WITHOUT using levi civita ? | Nov 27, 2017 |

B Prove that tangents to the focal cord of parabola... | Nov 16, 2017 |

I Prove that only one straight line passes through two point | Sep 19, 2017 |

A Can you generate an image to fit the following features? | Feb 3, 2017 |

**Physics Forums - The Fusion of Science and Community**