<p>Incoming senior taking SAT Math 2 here. </p>
<p>Was wondering if there is an easy way to memorize trigonometric functions and all? (Sinx+cosx=1, etc.)</p>
<p>Also, any tips for probability and combination questions? I'm really weak in this part. </p>
<p>And please tell me that the real test was easy. Scored around 720, 670, 710 is the first three practice tests. Is this good enough?</p>