Practice problem
Which values of xxx satisfy sin(x)+sin(∣x∣)=0\sin(x) + \sin(|x|) = 0sin(x)+sin(∣x∣)=0?
x≤πx \le \pix≤π
x≤0x \le 0x≤0
x=πn+π2x = \pi n + \frac{\pi}{2}x=πn+2π for any integer nnn
x≥0x \ge 0x≥0
x=πnx = \pi nx=πn for any integer nnn
This is satisfied for all xxx.
Type a concept, like “slope” or “photosynthesis”.