((1+cos2x)×(1+cosx))/(sin2x×cosx)
=(2cosx的平方*(1+cosx))/2sinx*cosx的平方
=(1+cosx)/sinx
=((1+cosx)/2)/(sinx/2)
=cos(x/2)的平方/((sin(x/2)*COS(X/2))
=cos(x/2)/(sin(x/2)
=cot(X/2)
((1+cos2x)×(1+cosx))/(sin2x×cosx)
=(2cosx的平方*(1+cosx))/2sinx*cosx的平方
=(1+cosx)/sinx
=((1+cosx)/2)/(sinx/2)
=cos(x/2)的平方/((sin(x/2)*COS(X/2))
=cos(x/2)/(sin(x/2)
=cot(X/2)