while solving trigonometric equations many times we get answer in different forms depending on the way in which we solve the problem , so what is the best way to ascertain that all the answers are the same ???????
Hi, I hope I got your question right. Due to the nature of trig' functions as seen in the Unit Circle (wiki for more info). so sin30=1/2 but sin150=1/2 as well. The simple identity for this is sinx=a+180k,a