EvelynMik
EvelynMik
03-11-2016
Mathematics
contestada
1+sin^2 x = 2-cos^2 x
Respuesta :
Аноним
Аноним
03-11-2016
1+sin²x=2-cos²x
Remenber: sin²x+cos²x=1 ⇒sin²x=1-cos²x
1+sin²x=
1+(1-cos²x)=
2-cos² x (this is true)
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