Question

Find the first positive x-intercept of -3cos(2x+3).

Answer 1

0.9 would be the first positive x-intercept, graph it on a graphing calculator and use the trace function to see where y=0, that will be an x-intercept

Answer 2

Try to solve by stepping it out to smaller parts then find the positive.

Answer 3

or you could just set that equation equal to 0 and solve for x, that would also work if you dont have a graphing calculator

Answer 4

yup both ways work

Answer 5

What is the trace function?

Answer 6

Thats why u graph it out on a chart or on graph caculator and find the pattern :}}

Answer 7

the trace function is a button on the ti-83 and higher calculator in the upper right hand corner next to graph

Answer 8

Oh okay so it would be 2.97?

Answer 9

yes

Answer 10

Thank you!