What is the domain of f(x) = cos(x)?

A)the set of real numbers Negative 2 pi less-than-or-equal-to x less-than-or-equal-to 2 pi
B)the set of real numbers Negative 1 less-than-or-equal-to x less-than-or-equal-to 1
C)the set of real numbers 0 less-than-or-equal-to x less-than-or-equal-to 2 pi
D)the set of all real numbers

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .