Report copyright - PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA … · 1 Arc length, s r Panjang lengkuk, s j 2 Area of sector, 2 2 1 A r Luas sector, 2 2 1 L j 3 2 A A sin cos 1 4 A sec 1 tan2 A 5 2 ec
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