Plz read it . I'm going to draw the derivative of sine at 45 in degree .
y1=Sine 45 =0.707106 and y2=sine 45.001 =0.707119
now dy/dx =0.012
I know this answer is approximately drawn. We know that the derivative of sinX is cosX . So the derivative of sine at 45 is equal to the simple value of cos45=0.707
(0.012 is not equal to 0.707) Thats why I have observed that practically the derivative of trigonometric functions is proved only in Radion . Why it is not proved in Degree ? For example (in Radion) the derivative of sine at (pi/4) =0.707 which is exactly the same for the simple value cos(pi/4)=0.707 thats proved it .
But in Degree the derivative of sine at 45 = 0.012 as I draw it above which is against the simple value of cos45= 0.707 .
I have calculated it by hand as well as by calculator . Plz Find the reason behind it . Akhtar