cos(π+t) + sin (3π/2 - t) > √2 решить неравенство

Question

cos(π+t) + sin (3π/2 - t) > √2 решить неравенство

Answer 1

-cost-cost>√2
cost<-√2/2t∈(5π/4+2πn;7π/4+2π/4)