[1]2∫cos2(θ-α)dθ=sin2(θ-α)
a=sin2(π/8-α)+sin2α
b=sin2(π/4-α)-sin2(π/8-α)
c=sin2(3π/8-α)-sin2(π/4-α)
d=sin2(π/2-α)-sin2(3π/8-α)
e=sin2(5π/8-α)-sin2(π/2-α)
f=sin2(3π/4-α)-sin2(5π/8-α)
g=sin2(7π/8-α)-sin2(3π/4-α)
h=sin2(π-α)-sin2(7π/8-α)
i=sin2(9π/8-α)-sin2(π-α)
j=sin2(5π/4-α)-sin2(9π/8-α)
k=sin2(11π/8-α)-sin2(5π/4-α)
l=sin2(3π/2-α)-sin2(11π/8-α)
m=sin2(13π/8-α)-sin2(3π/2-α)
n=sin2(7π/4-α)-sin2(13π/8-α)
o=sin2(15π/8-α)-sin2(7π/4-α)
p=sin2(2π-α)-sin2(15π/4-α)
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