Evaluate the following integrals:
Add and subtract α in the numerator
⇒ 
⇒ 
Numerator is of the form sin(A - B) = sinAcosB - cosAsinB
Where A = x + α ; B = 2α
⇒ 
⇒ 
⇒ 
⇒ 
As 
⇒ cos(2α)x + sin(2α )ln|sin(x + α )|
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