4.1 Radian Measure :P

Don't get bored yet, we just started learning for this chapter. Cheer Up !

This is a brief about this chapter. Take a look Ok :)

Okay, lets sum up this sub topics..

• The radian measure of  angle θ is defined as the length, a, of the arc that subtends the angle divided by the radius,r , of the circle : θ = a/r
• 2π rad = 360° or π rad = 180°.
• To convert degree measure to radian measure, multiply the degree measure by π/180° radians.
• To convert radian measure to degree measure, multiply the radian measure by (180/π)°.