A question says solve with no definite domain
Now I know how simple this is ..
But in class the teacher started explaining some weird stuff I couldnt understand.
Anyway, I know that I do :
now arent I supposed to do the following ? :
So the solutions are
Is the answer correct ? or am I doing something wrong :S
My teacher presented positive answers (+60) and not -60..
and in Wolfram Alpha, the answers are 120 and 60 ..
Please explain why
Ok so I found out that there are both "Solutions" and "Elementary Solutions" in Wolfram Alpha.
Elementary solutions : x = -pi/3 = -60
But what are " Solutions" for ?
x = 2/3 (3 pi n+2 pi) =240, n element Z
x = 1/3 (6 pi n-pi) =-60, n element Z
Well anyway I got the 2 solutions correct, which is -60 and 240 ..
Dont know where I went wrong ..
I guess problem is solved then Im correct
Thankksss all for replying