Question

упростить 1/sint(sin^2t+cos^2t+ctg^2t)

Answer 1

1/sint*(sin²t+cos²t+ctg²t)=1/sint*(1+ctg²t)=1/sint*1/sin²t)=1/sin³t
если имелось ввиду
1[:sint*(sin²t+cos²t+ctg²t)]=1:(sint*1/sin²t)=1:1/sint=sint