What is the general solution for cot(θ)=-1,cos(θ),90<θ<180 ?

The general solution for cot(θ)=-1,cos(θ),90<θ<180 is No Solution for θ\in\mathbb{R}

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cot(θ)=-1,cos(θ),90<θ<180

cot (θ) = - 1, cos (θ), 9 0^{\circ} < θ < 18 0^{\circ}

No Solution for θ \in R

Solution steps

cot (θ) = - 1, cos (θ), 9 0^{\circ} < θ < 18 0^{\circ}

General solutions for

cot (θ) = - 1

θ = \frac{3 π}{4} + πn

Solutions for the range

cos (θ)

No Solution for θ \in R

2 sin (3 θ) + 1 = 0, 0 \leq θ \leq 2 π

arctan (x) = - \frac{π}{6}

cos^{2} (x) - 3 cos (x) = 4

csc (θ) = \frac{5}{2}

x, sin^{2} (x) = \frac{1}{2}

What is the general solution for cot(θ)=-1,cos(θ),90<θ<180 ?
The general solution for cot(θ)=-1,cos(θ),90<θ<180 is No Solution for θ\in\mathbb{R}