trigonometry....yeah its a tough but an easy topic....am not an expert advice you....but still...the only way of learning things is be very clear with your basics and concepts plus formulas must be in your finger tips....
and there is one more thing when you solve your package you must read and try to understand the questions properly because there are two reasons ...one is ofcourse everyone knew to answer it...the second is 99.99999 % of answer is in the question....
thank you ...hope i just told a way for studying..!!!
