Question

зная что 0 2 решите ур-е
sin t = 1
3 Упростите
cos^t-(ctg^t+1)sin^t

Answer 1

sint=1
t=π/2+2πk,k∈z

cos²t-(ctg²t+1)*sin²t=cos²t-1/sin²t *sin²t=cos²t-1=-sin²t