CSC, Sec, Cot, and CSC^-1, Sec^-1, Cot^-1 on Calc

**qbkr21** · December 7th 2006, 10:07 AM

How would I imput all of these into a TI 83/84 where there are no buttons to imput them help would be of essence...

**topsquark** · December 7th 2006, 10:50 AM

Originally Posted by qbkr21

How would I imput all of these into a TI 83/84 where there are no buttons to imput them help would be of essence...

$csc(x) = \frac{1}{sin(x)}$

$sec(x) = \frac{1}{cos(x)}$

$cot(x) = \frac{1}{tan(x)}$

So for $csc \left ( \frac{ \pi}{3} \right )$ , for example, find $sin \left ( \frac{ \pi}{3} \right ) = \frac{\sqrt{3}}{2}$ and take the inverse (the $x^{-1}$ button): $csc \left ( \frac{ \pi}{3} \right ) = \frac{2}{\sqrt{3}} = \frac{2\sqrt{3}}{3}$ .

For the inverses the process is similar. For example: $sec^{-1}(2)$ , you would find $cos^{-1} \left ( \frac{1}{2} \right ) = \frac{\pi}{3}$ .

-Dan

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