Problems 'I. Let 6 = arctan(1(}). Compute the exact values of all six basic trigonometric functions at 6. In other words, compute the exact values of sin 9, cos 6, tan 6, can 9, sec 6, and not 9. (Recall that arctan (sometimes also known as tan1) is the inverse of the restriction of the tangent function to a certain part of its domain.)