sin2y+cos2y=1; 1+tan2y=1/(cos2y); cos2y=1/(1+tan2y); cos y= (1/(1+tan2y))1/2; cos y = 3-1/2
sin x = 1 - 1/31/2= (31/2-1)/31/2; x = arcsin (31/2-1)/31/2
Using calculator x = 25 degrees
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