solution to 1) Factorial kth
solution to 1) k- th factorial; 3) partial solution to Taylor Series Sine/Cosine calculation, couldn't add the upper bound precision, instead added a precision step to set how many steps into the series to go. Works acceptable up to 7. Created also two methods that calculate the one based on the other - don't seem to work well when 0 - can escape this with 0 condition inside method. I would gladly see the best solution of this and task 2.