Find the set of all in that satisfy .

MATHEMATICS · Subjective · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Find the set of all xx in (−π2,π2)\left(-\frac{\pi}{2},\frac{\pi}{2}\right) that satisfy ∣4sin⁡x−1∣<5|4\sin x-1|<\sqrt5.

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