Please explain why is the hypotenuse √(2) while the radius seems to look like 1, ie. when Cos(0)=1
yes you're right about the pi, haha, I guess I was thinking about apple pies looking at the unit circle
Dear ugkwan,
In my post I have considered a circle with a radius of . Actually you can consider a circle with any radius you like. For example if the radius is a, then then at (taking AB=OB=b) Now,