Answer:
Step-by-step explanation:
4cos x - 1 = 0 is equivalent to 4cos x = 1 and then to cos x = 1/4.
The cosine function is defined as cos x = (adjacent side) / (hypotenuse).
Here cos x = 1/4. To find the angle x, we use the inverse cosine function:
x = arccos (1/4). For the angle x, the adjacent side length is 1 and the hypotenuse length is 4.
