# How do you find the exact values of #costheta# and #tantheta# when #sintheta=-1/2#?

##### 1 Answer

May 10, 2018

#### Explanation:

Get a new triangle, question writer! Seriously, there's nothing about this question that requires using one of the two cliche triangles of trig, yet this question does.

Knowing only the sine, we cannot determine the sign of the cosine or of the tangent.