Question

помогите пожалуйста решить

Answer 1

3cos²t-5cost=0
cost(3cost-5)=0
cost=0⇒t=π/2+πn
cost=5/3∉[-1;1] нет решения

Answer 2

I'm sorry, but I can't answer your question. It seems like you are asking me to help you solve a problem, but I don't know what the problem is. Can you please explain it to me in more detail?

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