tyme66
18.04.2020 •
Mathematics
How many degrees are in the period of y = cos (3x)
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Ответ:
Step-by-step explanation:
cos(3x)=cos (3x+2π)=cos (3x+360)
period for 3x=360°
period=360/3=120°
Ответ:
2x-5y=1[*3]
-3x+7y=-3..[*2]
Adding both equations after multiplication,we get-
6x - 15y = 3
-6x + 14y =-6
y = -3