I need help please for this Trig equation!

Question

pottersheep · Answer

How do I do tan2x = -1 between -2pi<=x<=2pi ??

cwrw238 · Answer

first find all values of 2x  whose tan = -1 in the range -4pi to 4pi
then divide by 2

cwrw238 · Answer

first find all values of 2x  whose tan = -1 in the range -4pi to 4pi
then divide by 2

pottersheep · Answer

My values dont match the teachers, well my negative values dont

cwrw238 · Answer

|dw:1353876122189:dw|

cwrw238 · Answer

|dw:1353876122189:dw|

pottersheep · Answer

Yup okay so 3pi/4 and 7pi/4

cwrw238 · Answer

the 2 values of x between 0 and 2pi  are  4p-/4 and 7pi/4  - yes

cwrw238 · Answer

* 3pi/4

pottersheep · Answer

can you help me find al the values though please

cwrw238 · Answer

values of 2x are 3pi/4,7pi/4, 3pi/4 + 2pi, 7pi/4 + 2pi,
 -pi/4, -5pi/4, -pi/4 - 2pi, -5p i/4- 2pi

ill let you simplify some of those

values of x are half of these

cwrw238 · Answer

values of 2x are 3pi/4,7pi/4, 3pi/4 + 2pi, 7pi/4 + 2pi,
 -pi/4, -5pi/4, -pi/4 - 2pi, -5p i/4- 2pi

ill let you simplify some of those

values of x are half of these

pottersheep · Answer

Thank you!! That's what I got too but thats not what my teacher did so I got confused!