Answer:
The answer for this is the thrid one 1/4
Answer:
h is 2
Step-by-step explanation:
Answer: x=2π/3 and x=4π/3
Step-by-step explanation:
The equation we have is
. All we have to do is get cosine alone to find the 2 values of x.

Now that we have our cosine left, we can use our unit circle to figure out when does cosx=-1/2. Cosine is the x value of the coordinate.
x=2π/3
x=4π/3
They aren't similar because they're not proportional (the sides do not form equal ratios)<span />