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Tan 30° = 2 Tan 15° /(1 - Tan² 15°)
1/√3 = 2 Tan 15° /(1 - Tan² 15°)
Tan 15° = 2 - √3
atau kalo mau hasil koma / desimal =
Tan 15° = 0.2679
semoga bisa membantu :)