EvelynMik EvelynMik

03-11-2016
Mathematics

contestada

1+sin^2 x = 2-cos^2 x

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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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