Which of the following is equivalent to tan(5pi/6)

We have find the value of  .

The given function lies in 2nd quadrant.

In the 2nd quadrant value of tanx is negative.

Then ,

We know that ,  

So,

The value of    is   .

For more information about Trigonometry functions click the link given below.

link

Step-by-step explanation:

We need to find the value of . We can write it as :

We know that comes in second quadrant. The value of tan is negative. Also, do not change. So,

So, the value of is .

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option