How do you find the exact value of tan^-1 (-1/sqrt3)tan1(13)?

1 Answer
Mar 19, 2018

color(indigo)(theta = pi n - (pi/6)θ=πn(π6) with color(purple)(n in ZZ

Explanation:

Let theta = tan ^ -1 (-1/sqrt3)

tan theta = tan ( tan^ -1 (-1/ sqrt3)) = -(1/sqrt3)

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From the above tables,
tan (pi - (pi/6)) = tan -(pi/6) = -(1/ sqrt3)

Generalising the same,

color(indigo)(theta = pi n - (pi/6) with color(purple)(n in ZZ