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Verified answer
Bab TrigonometriMatematika SMA Kelas X
sin a = 1/√3
cosec a . tan a
= 1/sin a . sin a/cos a
= 1/cos a
= 1/(√(1 - sin² a)
= 1/(√(1 - (1/√3)²)
= 1/(√1 - 1/3)
= 1/(√(2/3))
= √3 / √2
= 1/2 √6
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