I'm learning how to code Ok, so I'm teaching myself how to code in HTML and I thought that a good starting point would be to edit my school's home page using the developers tools.
I want to know how well I did. Can someone who knows HTML please criticize my work?
The screenshot is attached

The value of sin(x) (in radians) can be approximated by the alternating infinite series create a function (prob3_2) that takes inputs of a scalar angle measure (in radians) and the number of approximation terms, n, and estimates sin(x). do not use the sin function in your solution. you may use the factorial function. though this can be done without a loop (more efficiently), your program must use (at least) one. you may find the mod() function useful in solving the problem.