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 picture is blank for me. Please take clearer pictures leveled with the question! :)
I looked it up, and after some research, I came across a legitimate answer of approximately 30 gallons.
Pretty sure it’s the first answer
Answer: 2
Step-by-step explanation: 6 + (-4) = 6 - 4 = 2
