Pre-Calc

Using the difference for formula, find the tan 255.
Step by step would be appreciated

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  1. tan(255) = tan(180+75) = tan 75 = tan(30 + 45)
    = (tan30+tan45)/ (1-tan30tan45)

    You can finish the rest.

    Note:
    tan(180+75) = (tan180+tan75)/ (1-tan180tan75)
    = (0+ tan75)/(1-0)
    =tan 75
    = tan (30+45)

    not my answer but credits to: mlam18

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