緑は$\cos X$,青は$\sin X$,赤は$sinX+cosX$
赤の式を$\sin$の式で表すとどうなるでしょう。

$ \sqrt{2} \sin(\theta+\frac{\pi}{4}) $

正解

$\frac{\pi}{2}

α = 3.961897402027128 rad (slider from 0 to 6.283185307179586, step 0.017453292519943295)
f(x) = sin(x)
g(x) = cos(x)
h(x) = sin(x) + cos(x)
A: (α, cos(α))
B: (α, sin(α))
C: (α, sin(α) + cos(α))
n = 2 (slider from 1 to 2, step 1)
D = Intersect(g, xAxis, (1.5707963191667385, 0))