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 Apr20 awarded Informed Apr20 comment Find the values of $\sin 69^{\circ},\sin 18^{\circ} , \tan 23^{\circ}$ Additional link for sin 1. This is also a useful document Exact Values of the Sine and Cosine Functions in In crements of 3 degrees. Apr20 revised Find the values of $\sin 69^{\circ},\sin 18^{\circ} , \tan 23^{\circ}$ Edited for sqrt Apr20 revised Find the values of $\sin 69^{\circ},\sin 18^{\circ} , \tan 23^{\circ}$ Edited for sqrt Apr20 answered Find the values of $\sin 69^{\circ},\sin 18^{\circ} , \tan 23^{\circ}$ Apr7 awarded Organizer Apr7 revised A 10 digit positive number and ordered triplets I have changed the Tag from Liner Algebra to elementary-number-theory Apr7 suggested approved edit on A 10 digit positive number and ordered triplets Mar18 revised IMO programs of different nations? I rewrote to added clarity. I have used points clairified in the comments. Also a spelling correction. Mar18 suggested approved edit on IMO programs of different nations? Mar17 answered Calculate difference in days to reference date Mar9 revised Why does the least common denominator work? Just added a clarification for my earlier answer. Mar9 revised How to represent sign function in range $[-1, 1]$ Put a ",' between -1 & 1 Mar9 suggested approved edit on How to represent sign function in range $[-1, 1]$ Mar9 answered Why does the least common denominator work? Jan30 revised How can a beginner researcher or Ph.D. student efficiently and effectively learn new concepts while staying motivated? Replaced the word 'type consuming' by 'time consuming' Jan30 suggested approved edit on How can a beginner researcher or Ph.D. student efficiently and effectively learn new concepts while staying motivated? Sep24 awarded Autobiographer Oct25 awarded Supporter Oct14 answered Find by integrating the area of ​​the triangle vertices $(5,1), (1,3)\;\text{and}\;(-1,-2)$