Posted by edward on .
prove that 4cos36+cot15/2=1+4+9+16+25+36,ifcot15/2 is1+cos15/+sin15

maths 
Steve,
Aside from the carelessness with parentheses, the statement as written is obviously preposterous, since cos(x) < 1 for any x, and cot(15/2) < 8.