Explain the theorem: For any real numbers x an y, cosx=cosy, implies x=2nπ±y, where n∈Z - Maths - Trigonometric Functions

Question

E x p l a i n   t h e   t h e o r e m :   F o r
  a n y   r e a l   n u m b e r s   x   a
n   y ,   cos x = cos y ,   i m p l i e s   x =
2 n π ± y ,   where   n ∈ Z

Ankita Agarwal · Accepted Answer

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E x p l a i n t h e t h e o r e m : F o r a n y r e a l n u m b e r s x a n y , cos x = cos y , i m p l i e s x = 2 n π ± y , where n ∈ Z

$E x p l a i n t h e t h e o r e m : F o r a n y r e a l n u m b e r s x a n y, \cos x = \cos y, i m p l i e s x = 2 n π \pm y, where n \in Z$