Grade 11Trigonometry
why -(cosx)=cosx -(sinx)=sinx
why -(cosx)=cosx
-(sinx)=sinx
1 Answer
Vijay Mukati
Actualy you make some mistake in writing the question. Actually it is cos(-x) = cos x and sin(-x) = sinx. This is because of cosx is a even function (symmtric about y-axis) and sinx is odd function(anti-symmtric about y -axis). Thanks.
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