2cos^2 x = 1 + cos 2x
cos^2 x = 1/2(1 + cos 2x)
f(x) = 6cos^2 x - 4 sin 2x = 6(1/2(1 + cos 2x) - 4 sin 2x = 3 + 3cos 2x - 4sin 2x
Answer:
it is 8 and two thirds
Step-by-step explanation:
The axis of symetry, or A.o.S, intersects a parabola at its vertex. The answer is x=1
Gallons of gas needed = 220/23 = 9.565 gallons
Amount of money spent on gas = $2.35 x 9.565 = $22.48
To the nearest tenth = 4.4 and to the nearest whole number is 4. Whatever estimation it asks you.
