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= sin 90 = 1
tan 810 = tan ( 360x2 + 90 )
= tan 90 = 1/0 karena yang ditanya CoT, maka cot = 1/tan x
cot 810 = 0/1 = 0
sin 1470 = sin ( 360x4 + 30 )
= sin 30 = 1/2 karena yang ditanya cosec, maka cosec = 1/sin x
cosec 1470 = 2/1 = 2