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Tanx can be written as tan0.5x by dividing it by 2.

tanx1/2=tan0.5x

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I doubt that you can, since the tangent of the whole angle is a function of the tangent of the half-angle and of the secant of the whole angle. Please see the link.

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βˆ™ 11y ago
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Q: How do you write tanx in terms of tan0.5x?
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