- Solve the following trigonometric equation on the domain [0,360] tanx = cotx?

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How many molecules are in 97.8g of FeCl3? Is there a musical term for two independent, non-complementary, parts being played simultaneously? What about for three parts? 7^(x+1) + 7^x + 7^(x-1) = 399, what is x? Can reality itself be programmed by interacting with it - in particular asking questions that lead to where you're directing it to go? Find all solutions to the following system of nonlinear equations.
(x − 2)^2 + y ^2 = 20
(x + 2)^2 + y^ 2 = 20?