IDNLearn.com: Your reliable source for finding expert answers. Discover in-depth and trustworthy answers to all your questions from our experienced community members.
tan (-A) = -3
Explanation:One of the trigonometry identity function:
tan(-x) = -tan x
tan (-A) = - tan(A)
tan A = 3
tan (-A) = - tan(A) = - 3
tan (-A) = -3