Question

tan(2x)=-1

Answer 1

hoiw do you solve this?

Answer 2

Do inverse tan(-1), which gives you 2x, and then solve it normally. Questions?

Answer 3

tan 2x = -1.
Trig conversion table gives: tan 2x = tan 3Pi/4, then x1 = ...
The trig unit circle gives another arc that has the same value (-1);
tan 2x = tan (3Pi/4 + Pi). Then x =....

Answer 4

NOTE. To solve trig equations, don't simply use triangle trigonometry. Use the trig unit circle as basic mean to solve trig equations since trig functions are all periodic circular functions.