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Tuesday 2 August 2016

Menghitung Radian dan Derajat

TRIGONOMETRI
  • Ukuran Sudut
               Satuan ukuran sudut yang sering dipakai adalah derajat (...°) dan radian (rad).
          
         *[ derajat (°) =>   radian ( rad) ]
     

Keliling Lingkaran:

              360° = 2 radian
              360° = 2 rad   atau biasa disebut  2  r
       a). 1 rad = ..... ° ?
       b). 1°      = ..... rad ?    
Jawab:

a).  360° = 2 rad                                           
                                                                    
   * 1 rad = .... °                                             
     360° = 2 rad 
     360° = 2 x 22 rad                                
                      7
     360  = 22 rad
      2        7

     180  = 22 rad                    
                7

     180 x  rad
             22

     1260 = 1 rad
      22

     57,272°... = 1 rad
     57,3° = 1 rad

b).  57,3° = 1 rad
      57,3° x  = 1 rad

     * 1° = .... rad
  
        =   1    rad
              57,3
       1° =       1        rad                                 
               57,272...
       1° = 0,017 rad

Contoh Soal:
 1). 30°        = ......  rad
 2). 90°        = .....  rad
 3).  2  rad = ..... °
       3
 4).  1  rad = ..... °
       3
 Jawab:

 1). 30° = ......   rad
             = 30 x   /180 rad =  /6 rad = 1/6 rad
 2). 90° = ......   rad
             = 90 x   /180 rad =  /2 rad = 1/2 rad
 3).  2  rad = ..... °
       3
                    =  2 x 180 = 120°
                        3
 4). 1  rad = ..... °
      3
                   = 1 x 180 = 60°
                      3
SELESAI...
Semoga Bermanfaat :)



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