Question

please tell me the formula of cot(3x)

Answer 1

$\frac{3 \cot(x) - { \cot }^{3}x }{1 - 3 { \cot }^{2}x }$

Answer 2

"Here i s the solution:

Formula of cot(3x) => cot3x = [3cotx - cot^3 (x)] / [1 - 3cot^2 (x)].

Explnation:

cot is a short way to write 'cotangent'. This is the reciprocal of the  trigonometric function 'tangent' or tan(x).

Therefore, cot(x) can be simplified to 1/tan(x).

Using trigonometric rules, an alternative way to write 1/tan(x)  is cos(x)/sin(x)."