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Problem
Problem
- Solve
tan
x
−
tan
2
x
>
0
\tan x - \tan^2 x > 0
tan
x
−
tan
2
x
>
0
and
∣
2
sin
x
∣
<
1
|2 \sin x| < 1
∣2
sin
x
∣
<
1
.
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