The equation represents the population of an invasive fish species in a large lake, years since 2005, when the fish population in the lake was first surveyed, what was the population in 2005

How do you solve a question like this?

Find cot x if sin x cot x csc x = √2

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)