Answer:
B. [tex]-\text{tan}(20^{\circ})[/tex]
Step-by-step explanation:
We have been given an expression [tex]\text{tan}(-20^{\circ})[/tex]. We are asked to find the equivalent expression to our given expression.
We know that tangent is an odd trigonometric function and it is symmetric about the origin.
A function is known as an odd function, if [tex]f(-x)=-f(x)[/tex] and it is symmetric with respect to origin.
Since tangent is an odd function, therefore, [tex]\text{tan}(-20^{\circ})=-\text{tan}(20^{\circ})[/tex] and option B i the correct choice.
