Notice, triangle ABC is equilateral.
BD = √(3)+2-1
BD = (√(3)+1) units.
BD = 2.73205080757 units.
BC = 3.73205080757 units.
(CD)² = 2.73205080757²+3.73205080757²-2*2.73205080757*3.73205080757cos60
CD = 3.34606521495 units.
(2.73205080757/siny) = (3.34606521495/sin60)
y = 45°
Calculating x.
It implies;
x+y = 60
x = 60-y
And y is 45°
Therefore;
x = 60-45
x = 15°
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