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SUDUT ( . ° − °)
cos . 360° − ° = cos(− ) = cos
tan . 360° − ° = tan(− ) = −tan
csc . 360° − ° = csc(− ) = −csc
sec . 360° − ° = sec(− ) = sec
cot . 360° − ° = cot(− ) = −cot 
