Respuesta :

For this case we have the following expression:
 tan 120º
 Rewriting we have: tan 120º = sine 120º / cosine 120º
 We can rewrite the expression based on an acute angle.
 We have then:
 tan 120º = sine 60º / - cosine 60º
 Rewriting we have:
 tan 120º = - tan 60º
 Answer:
 the function as 120º as a function of an acute angle is:
   A. - tan 60º