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Four Quadrants of the Cartesian Plane

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Quadrant II sin θ, csc θ : + cos θ, sec θ : − tan θ, cot θ : − π 2 < θ < π Quadrant I sin θ, csc θ : + cos θ, sec θ : + tan θ, cot θ : + 0 < θ < π 2 Quadrant III sin θ, csc θ : − cos θ, sec θ : − tan θ, cot θ : + π < θ < 3π 2 Quadrant IV sin θ, csc θ : − cos θ, sec θ : + tan θ, cot θ : − 3π 2 < θ < 2π

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