Câu 1. Tìm tập xác định của hàm số y x = + 2021cot 2 2022 . A. \ 2 D k     = +     . B. \ 2 D k   =     . C. \ 4 2 D k     = +     . D. D =

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

How are sas and sss used to show that two triangles are congruent?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).