# how the formula sin(2npi+x)=sinx came.why was 2npi avoided

As every trigonometric function is periodic for 360 degrees , it means after every 360 degrees the values will be repeated again.
Hence for sin (2n$\mathrm{\pi }$ + x ) = sinx , we can take any n here and n is natural number.
Similarly it is true for cos , tan also.

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