GuadalupeBermudez
GuadalupeBermudez
07-07-2016
Mathematics
contestada
If sin x = .42, what is cos x?
Respuesta :
mathmate
mathmate
07-07-2016
From the identity,
sin^2(x)+cos^2(x)=1
then
cos(x)=sqrt(1-sin^2(x))
where sin(x) is given as 0.42.
Note that the above answer applies to 0<x<90 degrees
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