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(1_1)　cos(180-θ) = -cosθ
(1_2) sin(180-θ) = sinθ

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(2_1)　cos(90-θ) = sinθ
(2_2) sin(90-θ) = cosθ

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(3_1)　cos(90+θ) = -sinθ
(3_2) sin(90+θ) = cosθ

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(4_1)　cos(180+θ) = -cosθ
(4_2) sin(180+θ) = -sinθ

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(5_1)　cos(270-θ) = -sinθ
(5_2) sin(270-θ) = -cosθ

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(6_1)　cos(360-θ) = cosθ
(6_2) sin(360-θ) = -sinθ