Answer:
see explanation
Step-by-step explanation:
Using the double angle identity for sine
sin2x = 2sinxcosx
Consider left side
cos20°cos40°cos80°
=
(2sin20°cos20°)cos40°cos80°
=
(2sin40°cos40°)cos80°
=
(sin80°cos80° )
=
(2sin80°cos80° )
=
. sin160°
=
. sin(180 - 20)°
=
. sin20°
=
= right side , thus proven
The least common factor of x and x squared is x
Answer:
y=2x+7
Step-by-step explanation:
2x−y+4=0
y=2x+4
m=2
Line are parallel, so their slope is the same.
A(-1,5)... x1 =-1,y1 =5
y-y1 =m(x-x1)
y1 - 5=2(x-(-1))
y1 - 5=2(x+1)
y1-5=2x+2
y=2x+2+5
y=2x+7
Answer:
z = 6
Step-by-step explanation:

87 is grater because 13.988 has a decimal point