sinx<0 - (π+2πk,π/2+2πk), cosx≥1/2 - (−π/3​+2πk,π/3​+2πk), sin x ≤ –1/2 - (7π/6​+2πk,11π/6​+2πk), sin x > 0 - (0+2πk,π+2πk), cos x > \sqrt{2}/2 - (−π​/4+2πk,π/4​+2πk), cos x ≤ 0 - [π/2​+2πk,3π/2​+2πk], tan x < 1 - (πk,π/4​+πk),

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