Originally Posted by

**eleventhhour** 1. State all the angles between 0 degrees and 360 degrees that make each equation true.

d) tan135 = -tan______________ (there's a blank space here)

So, I understand that you have to use the appropriate equation, but the textbook gives two answers in the book, while I only got one. Also, I don't really understand what this process is doing. Could someone explain what the equations mean for each quadrant?

I attached a photo from the textbook so you can see what I'm confused about. The textbook doesn't really explain well, and I can't find anything similar online. So, I'd really appreciate an explanation of this! Thanks.

And this was my solution (for one of the two possible answers according to the textbook):

tan(180-135) = -tanX

45 = X