Find the principal solution of
  1. cos x =√3/2
  2. cosec x = -2/√3

  1. Here is the link for the answer to your query: 2)
https://www.meritnation.com/ask-answer/question/q-find-the-principal-and-general-solutions-of-cosec-x-2/trigonometric-functions/1168523
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