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kuadran 3 : yg positif tan dan cot
kuadran 4 : yg positif cos dan sec
sin = + cos= - tan= - cosec=+ sec= - cot= -
kuadran 3
sin= - cos= - tan=+ cosec= - sec= - cot=+
kuadran 4
sin= - cos=+ tan= - cosec=- sec=+ cot= -