Calculate sides of a right angle triangle with JavaScript?

Question

If I did not know that side AB was 489.84 or that side BC was 12.66, how could I calculate these two lengths with JavaScript given I had all the other information?

Answer 1

Use the Math.sin and Math.cos functions. Note: these functions accept radians, you would thus need to convert degrees by using rad = deg * Math.PI/180:

Math.cos(88.52 * Math.PI/180) * 490; // 12.655720238100102
Math.sin(88.52 * Math.PI/180) * 490; // 489.83653676022874