Can someone tell me what tan^-1(-2/-5) is in radians? Appearently it matters if the number are negative. Like tan^-1(-1/-1)=pi/4 but you have to add two pi because it's in the second quadrant since both numbers are negative.

Question

anonymous · Answer

0.3805

anonymous · Answer

Does that take into consideration about the negative values?

anonymous · Answer

Like cause -2 and -5 are in different quadrants?

kira_yamato · Answer

tan^-1(-2/-5) = arctan(2/5) ≈ 0.380506377

anonymous · Answer

Does that take the quadrants into consideration because it apparently matters.

anonymous · Answer

Try looking at a graph of tan^-1 to understand what the question means. You'll notice that in the negative quadrants the values are equal and opposite to the values in the positive quadrant.

anonymous · Answer

just go on a graphing calculator, if possible, and graph y=tan^-1(x)