Posted by Shreya on Tuesday, November 6, 2012 at 8:14pm.
Trigonometric Functions, Radian Measure
∏ <-- will be using this for pi
Using exact values, convert to radians ( hint use fraction of ∏)
90° = 90°*∏/180° = 1∏/2
^^would it be right to also call it 2∏ radians?
Determine the angle at the centre of the circle, radius 6cm, for each arc length.Express each angle in radians and then in degrees.
a = rθ
3 = 6θ
1/2 = θ
^One of my friends got a totally different answer, and she got
θ = 2 rad
2*180/∏ = 114.59
^Ive no idea how she got that :S
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