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Use the periodic properties to find the exact value? Cot 7pi / 4 please help me?

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Use the periodic properties to find the exact value? Cot 7pi / 4 please help me?

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  1. cot(7π/4) = cot (-π/4) = cos(-π/4)/sin(-π/4)

    =cos(π/4)/-sin(π/4) = (√2/2)/(-√2/2) = -1

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