Working on Angles

We going to see one of the important note that every begineer will easily forget. Your programming language cannot understand degree, it can only understand Radian. So even if you get input in unit degree, convert that to Radian and proceed your code. Lets study this in detail with some sample codes.

NOTE:
Formula for converting Degree to Radian is to multiply the degree value by pi and divide it by 180

CODE

static void Main(string[] args) {
    //I want to find sin 30 degree, where the answer is 0.5. but if i try running below code i'll get different output
    Console.WriteLine(Math.Sin(30)); // Output : -0.988031624092862

    //This is because system cannot understand degree , we need to convert degree to radian
    Console.WriteLine(Math.Sin(30*Math.PI/180));// Output : 0.5

    //I want to find cos 30 degree, where the answer is 0.866025403784439. but if i try running below code i'll get wrong output
    Console.WriteLine(Math.Cos(30)); // Output : 0.154251449887584
    Console.WriteLine(Math.Cos(30*Math.PI/180)); // Output : 0.866025403784439
}

Exercises
1. Find sin 90 degree, Print it in console
2. Find cos 45 degree, Print it in console
3. Find tan 60 degree, Print it in console


(Click Here, For more exercises)