Buktikan!
a. sin A + cos A cotan A = cosec A
b. cosec A + cotan A = sin A
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1-cos A
a. sin A + cos A cotan A = cosec A
b. cosec A + cotan A = sin A
______
1-cos A
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sin A + Cos A ctgA= cosec A
sin A + cosA cosA/sinA= cosec A
sin A + cos²A/sinA= cosecA
(sin²A + cos²A)/sin A= cosec A
(sin²A + (1-sin²A))/sinA= cosecA
1/sinA= cosec A
cosecA=cosecA(terbukti)
yang B kok aku ga nemuin jawabannya?