The value of sin A or cos A never exceeds 1, whereas the value of sec A or cosec A is always greater than trigonometric ratios in solving the problems related to heights and distances. I. Basic Concepts. You have probably met the trigonometric ratios cosine, sine, and tangent in a right angled triangle, and have used them to calculate the sides and angles of those triangles. If (x;y) is a point on the unit circle corresponding to an angle, then x= cos() and y= sin(): Note that we begin measurin