Trigonometry

Angle

is said to be in standard position if its vertex

is at the origin of a rectangular coordinate system and its initial side coincides with the positive x-axis.

Positive

If the rotation is counterclockwise, the angle is considered

Negative

and if the rotation is clockwise, the angle is considered

1 degree

Equals to 1/360 revolution

1 min

Equals to 1/60 degree

1” (second)

Equals to 1/60 minute or 1/3600 degree

360 degree

1 rev

60’

Equals to 1 degree

60”

Equals to 1’

Convert 21.256degrees to the DM’S” form

21degrees 15’ 22”

Convert 50degrees 6’ 21” to a decimal in degrees

50.1058degrees

Radian measure of theta

is the number of "radiuses" that can fit in the arc that subtends e

2pie radians

Equals to 1rev or 360 degrees in radians

1 degree

Pie/180 radian