tanx=tan35.tan36.tan37......tan52.tan53, 0<x<90
Tính M= (tan2x(1+cox3x) + cot2x(1+sin3x))/((cos3x+sin3x)(1+cosx+sinx))
Tính M= (tan2x(1+cox3x) + cot2x(1+sin3x))/((cos3x+sin3x)(1+cosx+sinx))
tanx=tan35.tan36.tan37......tan52.tan53, 0<x<9028/5/2023, 12:48