Added cot Inverse Function

[Bha-wna]

This is for Hacktoberfest

[netlify[bot]]

✅ Deploy Preview for calculator-dhanushnehru ready!

Name	Link
🔨 Latest commit	f4736c5dbf2df37718ed7d0bacd93d043e89f692
🔍 Latest deploy log	https://app.netlify.com/sites/calculator-dhanushnehru/deploys/635273e4c976530009f8b9a7
😎 Deploy Preview	https://deploy-preview-86--calculator-dhanushnehru.netlify.app/
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[selemondev]

Hello there @Bha-wna👋, please resolve the conflicts so that we can be able to review and merge your pull request.