SOHCAHTOA is a mnemonic device for remembering the properties of the sine (sin), cosine (cos), and tangent (tan) functions.  In a right triangle, the sin of any non-right angle is equal to the opposite side divided by the hypotenuse (sin  = O/H).  Similarly, cosine function is equal to the adjacent side from the angle divided by the hypotenuse (cos  = A/H).  Finally, the tangent function is equal to the opposite side of the triangle divided by the triangle’s adjacent side (tan  = O/A).

    (1)  What is the COS of ?
 
    (2) What is the measure of ?

    (3)  What is the length of the hypotenuse?