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13-10-2017
Mathematics

contestada

Which expression equals 1?
a. sin(x) + cos(x)
b. sin^2(x) + cos^2(x)
c. sin^2(x) - cos^2(x)
d. sin(x) - cos(x)

Respuesta :

13-10-2017

b. sin^2 (x) + cos^2 (x)

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