Its adding 9 every time.
-3, 6, 15, 24, 33, 42, 51, 60
Answer:
5/3
Step-by-step explanation:
cos4x = cos2x
We know that:
cos2x = 1-2cos^2 x
==> cos4x = 1-2cos^2 (2x)
Now substitute:
==> 1-2cos^2 (2x) = cos2x
==> 2cos^2 (2x) + cos2x - 1 = 0
Now factor:
==> (2cos2x -1)(cos2x + 1) = 0
==> 2cos2x -1 = 0 ==> cos2x =1/2 ==> 2x= pi/3
==> x1= pi/6 , 7pi/6
==> x1= pi/6 + 2npi
==> x2= 7pi/6 + 2npi
==> cos2x = -1 ==> 2x= pi ==> x3 = pi/2 + 2npi.
<span>==> x= { pi/6+2npi, 7pi/6+2npi, pi/2+2npi}</span>
Answer:
232 in squared
Step-by-step explanation:
Find the area of one face and multiply it by 2
7 x 4 x 2=56
4 x 8 x 2=64
7 x 8 x 2=112
Add and you get 232
From least to greatest ,0.5, 1.25, 1.4,1.95, 2.0
