ibe9900
ibe9900
25-04-2017
Mathematics
contestada
simplify the expression
cot^2x - cot^2x cos^2x
Respuesta :
Аноним
Аноним
25-04-2017
cot^2x - cot^2x cos^2x
= cot^2x - {(cot^2x)(cos^2x)}
= cot^2x { 1 - cos^2x }
= cot^2x { sin^2x }
= (cos^2x/sin^2x) { sin^2x }
= cos^2x
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