<p>In each case, express each of the five remaining trigonometric functions in terms of the given function.</p>
<li>tanO</li>
<li>secO</li>
</ol>
<p>[O is for theta.]</p>
<p>For 12, I can only find secO and cotO which are +/-sqrt(1+tan^2 O) and 1/tanO respectively. How do I do the rest?</p>