# precalculus

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Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer.
tan θ = − sqrt 3/3

• precalculus -

tanØ = -√3/3

from the 30-60-90 triangle, you should recognize that tan 30° = 1/√3 = √3/3

or , using your calculator find tan^1 (√3/3) to get 30°

but the tangent is negative in II and Iv
so Ø = 150°
or Ø = 330°

check with your calculator, it is correct

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