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OpenStudy (anonymous):
Find sin 2x, cos 2x, and tan 2x if tan x= 2/3
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OpenStudy (anonymous):
n is in quadrant 1
OpenStudy (jennychan12):
draw a triangle. remember than sin2x = 2sinxcosx cos2x = 1-2sin^2x tan2x = \[\frac{ 2tanx }{ 1-\tan^2x }\]
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