Question

how to solve trigonometric inequality??​

Answer 1

If the inequality is complicated, containing two or more trig functions, solve it in 4 steps.

Step 1.Transform the given trig inequality into standard form R[x] > 0 (or < 0).

Example. The inequality (cos 2x < 2 + 3sin x) will be transformed into standard form: R[x] = cos 2x - 3sin x -2 < 0.Apr 10, 2019