<p>example: Arccos (- radical 2/2)
we all know the 'all students take calculus' rule.
so a negative cos would be either in QII or QIII. barrons says that since the angle is smaller than 0, it must be in QII. what about QIII?</p>
<p>another example: arctan (-1)....barrons says it must be in Q4. what about Q2?</p>
<p>idk if i make sense but i need serious help.</p>
<p>and how do u do exponential regression?</p>
<p>years after merger: 0,2,4,7</p>
<p>revenue: 3,4,11,25</p>
<p>what revenue would be predicted 13 years after merger?</p>
<p>how do u use to graphing calculator to find the least squares exponential regression for that data?</p>
<p>put 0,2,4,7 (years after merger) into list 1
put 3,4,11,25(revenue) into list 2</p>
<p>go back to home screen, go to STAT->CALC->ExpReg->Enter->L1,L2,Y1->Enter
->Zoom9</p>
<p>if you want to find value for year 13, trace->value->13, and then you’ll get y value</p>