Verified answer

24°51'39" = (24 + 51/60 + 39/3600)°

Your calculator can take it from there!

51'39" = 51 39 / 60 ' = 3099 / 60', which is 3099 / 3600 degrees = .8608 degrees.

So if your calculator doesn't have a csc button, find the sin 24.8608 degrees and then get the

reciprocal of that number.

you must have the hour min sec calculator that is sell at the market.