Kindly refer the link for your query.
https://www.meritnation.com/ask-answer/question/cosx-sinx-1-cosx-sinx-1equal-to-cosecx-cotx/introduction-to-trigonometry/2911940
Regards
https://www.meritnation.com/ask-answer/question/cosx-sinx-1-cosx-sinx-1equal-to-cosecx-cotx/introduction-to-trigonometry/2911940
Regards