Use inverse trigonometric functions to solve the following equations. If there is more than one solution, enter all solutions as a comma-separated list (like "1, 3"). If an equation has no solutions, enter "DNE". Solve tan(θ)=1 for θ (where 0≤θ< 2π).
θ=

Solve 7tan(θ)=−15 for θ (where 0≤ θ<2π).
θ=

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