This equation will be true for:
a) sin(x) = 0
b) cos(x) = 0
For what values of x in the given interval are either true?
Can someone please help me with this problem? I am completely lost on this and I haven't been doing so well in this class at all. If someone could explain how to do this I would really appreciate it. Thank you
Find all solutions in the interval [0, 2π).
(sin x)(cos x) = 0
These are among the special angles which you should have memorized.
For sin(x) = 0, these represent points on the unit circle whose y-coordinate is zero, that is, are on the x-axis. What angles correspond to these points?
For cos(x) = 0, these represent points on the unit circle whose x-coordinate is zero, that is, are on the y-axis. What angles correspond to these points?
Thank you so much. You guys are awesome.
I have just one last question if you're willing to help
Find all solutions to the equation.
cos2x + 2 cos x + 1 = 0
I assume this is about the same concept as the other two questions. But I don't know how to set it up.