# 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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