To three decimal places, find the value of the first positive x-intercept for the function f(x) = 2cos(x + 3). 2.712 −1.429 1.712 −1.712

so, to find the x intercept, we want f(x)=0. that instantly gives us cos(x+3)=0 bbecause 2 equal 0. cos(x+3) equals 0 when:

we also know that the arccosine of 0 is , meaning we are looking for the decimal approximation of: , which is -1.42920367, and when rounded to two decimal places it is -1.429

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0