Trigonometry

Measurment of <'s old way: degrees new way: radians

radians=180/pi pi=180 deg. pi=3.14 approx. 180 deg=3.14 radians

conversion of degrees to radians: x degrees/pi
example: 200 degrees=? radians 200/180 = 10pi/9 radians

conversion of radians to degrees: a/y radians x 180 degrees
example: 1/2 radians=? degrees 1/2 x 180= 90 degrees