`arctan(sqrt(3))` Evaluate the expression without using a calculator.

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Chapter 4, 4.7 - Problem 14 - Precalculus (3rd Edition, Ron Larson).
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loves2learn | (Level 3) Salutatorian

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You need to find value for which tan equals `sqrt3 ` . Using a unit circle, it can be determined that the answer is `pi/3 `

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