`(3^(40)+3^(39))/(3^(41)-3^(40))`

Evaluate : 3(40)^(1/3)-4 (320)^(1/3)-(5)^(1/3)

If f(x) = ""^(40)C_(1).x(1-x)^(39) + 2.""^(40)C_(2).x^(2)(1-x)^(38)+3.""^(40)C_(3).x^(3)(1-x)^(37)+ "….."+40.""^(40)C_(40).x^(40) , then the value of f(3) is

If f(x) = ""^(40)C_(1).x(1-x)^(39) + 2.""^(40)C_(2).x^(2)(1-x)^(38)+3.""^(40)C_(3).x^(3)(1-x)^(37)+ "….."+40.""^(40)C_(40).x^(40) , then the value of f(3) is

If f(x) =.^(40)C_(1).x(1-x)^(39) + 2..^(40)C_(2)x^(2)(1-x)^(38)+3..^(40)C_(3)x^(3)(1-x)^(37)+"….."+40..^(40)C_(40)x^(40) , then the value of f(3) is

If (4cos^(2)40^(@)-3)(3-4sin^(2)40^(@))=a+b cos20 then find the value of (a-b)

40^(3)-38^(3)+36^(3)-34^(3)+ cdots +4^(3)-2^(3) =

4cos^(3)40^(@)-3sin50^(@)=

sin^(3)20^(@)+sin^(3)40^(@)-sin^(3)80^(@)=