Cosine

                    Lesson 1

 

                     Problem:  

 

 

A = 36 ; AC = 53

AB = x

 

                                           Solution   Cos< = Base / Hypotenuse

                                           Step 1:        

                           

                                           Solution   Cos 36 = 53 / x

                                           Step 2:          

                            

                                           Solution   0.8 = 53 / x

Step 3:     x = 53 / 0.8                                            

 

Solution Answer : 66.3

Step 4:                                       

                   Complete

                                           Try two practice problems:

                                                                       

                                                                Do the following:

                                             

A.

<A = 40 ; AB = 17

AC = x

B.

<B = 65 ; AB = 49

BC = x

 

 

 

 

 

 

 

 

 

 

 

 

 

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