linksforwolframalpha

Link 1:

http://www.wolframalpha.com/input/?i=k+%3D+arctan%5B+0.75+*+tan%5B60%C2%B0%2F2%5D+%5D+%2F+arctan%5B+0.75+*+tan%5B100%C2%B0%2F2%5D+%5D

Link 2:

http://www.wolframalpha.com/input/?i=x+%3D+arctan%28+tan%2860+*+PI%2F360%29+*+600%2F800+%29+*+%28360%2FPI%29+%2F+75

Link 3:

http://www.wolframalpha.com/input/?i=3*%5Barctan%28+tan%2860+*+PI%2F360%29+*+600%2F800+%29+*+%28360%2FPI%29+%2F+75%5D