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Adv. Alg/Trig

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How would you solve tan(-335) without using a calculator? I got it to tan(25) but that's not one of the ones on our chart, and I'd use a sum or difference identity but we never learned one for tangent, if one exists.

  • Adv. Alg/Trig - ,

    I don't see a solution without a calculator.

  • Adv. Alg/Trig - ,

    Assuming the angles are in degrees,
    tan (-335) = -tan 25

    Use tan (a + b) = (tana + tanb)/[1 - (tana*tanb)]

    I don't see a suitable combination of a and b, either.

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