# Trigonometry

Find the exact value of tan2(Beta) if sin(Beta) = 5/13 (Beta in Quadrant II)

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2. 👎 0
3. 👁 149
1. sin x = 5/13
so tan x = -5/12

tan 2x = 2tan x/(1 - tan^2 x)
= 2(-5/12)/(1 - 25/144)
= -120/119

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2. 👎 0

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