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OpenStudy (anonymous):
Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2 sin 120° cos 120°
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OpenStudy (ajprincess):
sin2A=2sinAcosA cos2A=cos^2A-sin^2A=1-2sin^2A=2cos^2A-1 tan2A=2tanA/1-tan^2A. which one of these resembles the one given in ur question?
OpenStudy (anonymous):
Thank you I got - sqrt 3/2
OpenStudy (ajprincess):
welcome:)
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