USA here

found the engineering student

po-tay-toe, po-tah-toe

greek here, first time i hear of this

kekd

tan is also redundant. Frankly we can also get rid of one of sin or cos, since cos(x) = sin(pi/2 -x)

Whateverrr you say, Fred Astaire.

>not using the reciprocal of the derivative of the series expansion of sin x with an approximation of n=100

sin(x)/cos(x) * 1/cos(x) = sin(x) / cos^2(x) = -sin(x) /(sin^2(x) - 1)