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# tan 0.5 θ = -1? watch

1. tan 0.5 θ = -1 between 0 < θ < 360, find values for θ
2. What have you done/tried so far?
3. (Original post by usycool1)
What have you done/tried so far?
i tried to do inverse tan of the -1 and then double both sides and i ended up with -90 but i don't think thats right
4. (Original post by charlottec712)
i tried to do inverse tan of the -1 and then double both sides and i ended up with -90 but i don't think thats right
Yes, that's right so far. You want your solutions in the range 0 < θ < 360 though, so use graphs/CAST diagrams/whatever method you've been taught to identify other solutions within the range.

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Updated: January 13, 2015
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