Arash
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 Jan 4 awarded Autobiographer Jul 15 awarded Commentator Jul 15 accepted Calculating the points of tangency for two circles given a picture Jul 15 comment Calculating the points of tangency for two circles given a picture thanks so much for your help Jul 15 comment Calculating the points of tangency for two circles given a picture thanks,in the first equation i have x1,x2,y1,y2.i can use just this equation to calculate x3,y3 and x4,y4 .so why should i use second equation?thanks so much Jul 15 comment Calculating the points of tangency for two circles given a picture ?thanks,it seems great,i didnt understand about (a,b) this the center point of which circle? Jul 14 comment Calculating the points of tangency for two circles given a picture no,i dont have Length of tangent line Jul 14 comment Calculating the points of tangency for two circles given a picture @AndréNicolas:i did not understand what you said Jul 14 comment Calculating the points of tangency for two circles given a picture can i calculate hypotenuse of below triangle with Pythagorean formula and then calculate lengh of tangent line(again using Pythagorean) and then calculate (x3,y3) and (x4,y4) ? Jul 14 comment Calculating the points of tangency for two circles given a picture thanks but i dont know the value of theta Jul 14 asked Calculating the points of tangency for two circles given a picture Jun 23 awarded Student Jun 22 awarded Supporter Jun 22 awarded Scholar Jun 22 accepted What is $\overline{\sin({z})}$ equal to? Jun 22 comment What is $\overline{\sin({z})}$ equal to? thanks so much,this is correct Jun 22 awarded Editor Jun 22 comment What is $\overline{\sin({z})}$ equal to? i mean second,thanks Jun 22 revised What is $\overline{\sin({z})}$ equal to? deleted 1 characters in body; edited title Jun 22 comment What is $\overline{\sin({z})}$ equal to? thanks,but i mean sin(z) bar(all of sin(z) is under bar not just z) you edited my question mistakenly