Question

( left.operatorname{sot} iint frac{cos 2 x-cos 2 alpha}{cos x-cos alpha}right) d x )
( int frac{cos ^{2} x-1-left(cos ^{2} alpha-1right)}{cos x-cos alpha} d x )
( intleft(frac{cos ^{2} x-cos ^{2} alpha}{cos x-cos ^{2} alpha}right) d x )
( =int(cos x+cos alpha) d x )
( sin x+x cos alpha+c )

# cos2x-cos 2017 COS X-Cosa dx

Solution