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Pre-Calculus

Simplify arctan 1/3 + arctan 2/3(round to the nearest degree).

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  1. tan(arctan 1/3 + arctan 2/3)
    = (1/3 + 2/3)/(1-(1/3)(2/3)) = 9/7
    arctan(9/7) = 52.13°

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