find the sign of the expression cos 200°+sin200°
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The value of cos 200^o + sin 200^o is
We have, cos 200^o + sin 200^o = cos (180^o + 20^o) + sin (180^o + 20^o) = - cos (20^o) - sin (20^o) = - (cos (20^o) - sin (20^o))<0 . [ Since cos 20^o ...
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