Question

косинус ( 2п - x) - sin ( 3 п /2 + x)=1

Answer 1

task/27316765
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cos(2π - x) - sin ( 3π/2 + x)= 1  ;
cosx - ( -cosx) =1 ;
cosx =  1/2 ;
x =± π/3 +2π*n  , n ∈ Z .