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OpenStudy (anonymous):
what is 2tanX equal to
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OpenStudy (mathmath333):
\(\large\tt \color{black}{tan2\theta=\dfrac{2tan\theta}{1-tan^2\theta}}\)
OpenStudy (acal21):
tan(2x)= 2 tan(x) / (1 - tan^2(x))---.>identity
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