A drawing shows a right triangle and the calculations to obtain the value for tan(&#952;), cos(&#952;), and sin(&#952;) from f&#8217;(x): tan &#952; = f&#8217;(x)/1 = opp/adj; cos &#952; = adj/hyp = 1/square root of 1+ (f&#8217;(x))-squared; sin &#952; = opp / hyp = f&#8217;(x)/square root of 1+ (f&#8217;(x))-squared.