How do i solve these trigonometric ?

find all solutions in the interval [0, 2π).

(sin x)(cos x) = 0

find all solutions in the interval [0, 2π).

cos2x + 2 cos x + 1 = 0

find all solutions to the equation.

cos2x + 2 cos x + 1 = 0

Formulate the indicated conclusion in nontechnical terms. be sure to address the original claim. the foundation chair for a hospital claims that the mean number of filled overnight beds is over 523, and she is therefore justified starting a funding campaign to add a wing to the hospital. assuming that a hypothesis test has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.