What is the value of `(1/2)^2`?

What is the value of ((1)/(2)) sec 30^(@) + sqrt2 tan 60^(@) ?

The resultant of vec(A)+vec(B) is vec(R )_(1) . On reversing the vector vec(B) , the resultant becomes vec(R )_(2) . What is the value of R_(1)^(2)+R_(2)^(2) ?

What is the value of ((1)/(2)-sec30^(@)) ?

What is the value of 1/2+1/2div1/2 ?

What is the value of 1^2+3^2+5^2+……15^2 ?