<p>-sum and difference formulas for sin and cosine?
-trig identities?</p>
<p>any other ideas?</p>
<p>We can just put these equations into the programs area of the calculator, correct?</p>
<p>Make sure you know sequences/series.</p>
<p>I just did those in school so I'm good with those.</p>
<p>Any other formula ideas?</p>