Question

упростите, пожалуйста

Answer 1

а. tga*1/tga - (sina/cosa * cosa)^2 = 1-sina^2 =cosa^2

б.(1+sina * (1-sina) - cosa^2/1+sina*cosa = 1-sina^2-cosa^2/1+sina*cosa = 1-1/1+sina*cosa = 0/1+sina*cosa = 0