因为角A与角B互余
所以可以设角Ax°,角B(90-x)°
90-x-x=25
2x=65
x=32.5
25°+32.5°=57.5°
2角A-三分之一角B
=2*32.5°-1/3*57.5°
=65°-115/6°
=275/6°