MODERATE EXERCISES

(3) Find the values of the following, using the given diagram.

 

 (a) sin 

 (b) cos 

 (c) cot 

 (d) sec 

 The missing side = sqrt(142 - 102)
                  = sqrt(196 - 100)
                  = sqrt(96)
                  = 4

 (a) sin  = 4/14
           = 2/7

 (b) cos  = 4/14
           = 2/7

 (c) cot  = 4/10
           = 2/5

 (d) sec  = 14/10 = 7/5