HI,

I am preparing for CAT (Cunny assessment test).I am doing trigonometry and I have problem in solving trigonometric equation. I have studied reference angle, but I did not understand how to use the reference angles in solving trigonometric equations. It is very simple but I think I am missing something. I have been out of college for ten years. Could u please help me in solving the following trigonometric equation so that I can do rest of equations on my own. Thanks.

sin (x) + 2 = 3 for 0 degree <= x <= 30 degree.

sin x = 1

x = 90.

Could you please explain me how x= 90 by using reference angle.