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INTRO TO RADIANS

INTRO TO RADIANS

Important formula:

c = 2πr

Notes:

  • π radians in half a circle 
    • π  radians = 180 degrees

EX)

  • πθ  = 180
    ----      ------
    π           π 

CONVERTING RADIANS TO DEGREES

  • Multiply # of radians by 180/π 

DEGREES TO RADIANS

π radians/180 = 1 degree

  • multiply # of degrees by π radians/180 to figure out the number of radians



INTRO TO RADIANS

Important formula:

c = 2πr

Notes:

  • π radians in half a circle 
    • π  radians = 180 degrees

EX)

  • πθ  = 180
    ----      ------
    π           π 

CONVERTING RADIANS TO DEGREES

  • Multiply # of radians by 180/π 

DEGREES TO RADIANS

π radians/180 = 1 degree

  • multiply # of degrees by π radians/180 to figure out the number of radians