What is the solution to the equation?

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

If value of cos330° is √3/2 then find tan165°.