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  1. Number of solutions of a trig-root equation ●●○○○ 20 ptsFind the number of real solutions xx of the equation sin⁡(πx4)+cos⁡(π2−x4)=2\sin\left(\frac{\pi\sqrt x}{4}\right)+\cos\left(\frac{\pi\sqrt{2-x}}{4}\right)=\sqrt 2.