решить 1. 1-sin²t/1-cos²t+ tgt*ctgt
2. Cos²t-ctg²t/ sin²t-tg²t
3. 1-(sint-cos)/ (cost-sint)²
4. sin⁴t+cos⁴t+2sin²t*cos²t
5.tgt / tgt+ctgt

kachinlexa1999 kachinlexa1999    3   18.10.2020 03:59    2