Graph the equation y = 1 + 2 sin x. This curve crosses the x-axis in several places. Identify all the x-intercepts with 0 < x < 360.

Answer 1

It crosses the x-axis whenever sinx = -1/2. That is, whenever

x = (2k-1)? + ?/6
x = 2k? - ?/6

for any integer k.

If you just wanted the graph, why not visit any of hundreds of graphing sites, such as this one:

http://www.wolframalpha.com/input/?i=1%2B2sinx