How to be good at angles and trigonometry I am Computer Science Engineer and loved algebra side of Mathematics. But when it comes to trigonometry and angles and triangles, I do not understand anything since college time. And till now also whenever I get chance to avoid sin/cos/tan I consciously (because of fear) avoid that. 
Can you please suggest easiest way to learn trigonometry. 
Kindly do not suggest lengthy books. They will only discourage me at their best.
Thanks in advance

Practice is the only way to master any subject in Mathematics. You can look up some high school/college level books. I personally liked "Trigonometry" by S.L. Loney.
However, there are many other references available. Practice as many problems as you can.
