Question

How do I find the value of tan 11pi / 6?

Answer 1

Find `tan (11pi)/6`

Ans: `- sqrt3/3`

Explanation:

On the trig unit circle,
`tan (11pi)/6 = tan (-pi/6 + 2pi) = tan (-pi/6) = -tan (pi/6)`
Trig table gives --> `- tan (pi/6) = - sqrt3/3`