If and `phi(x)=1/(1+e^(-x))` `S=phi(5) +phi(4) +phi(3) + ..+phi(-3) + phi (-4) + phi(-5)` then the value of S is

If phi(x)=1/(1+e^(-x)) S=phi(5) +phi(4) +phi(3) + ..+phi(-3) + phi (-4) + phi(-5) then the value of S is

If phi(x)=(1)/(1+e^(-x)) and S=phi(5)+phi(4)+phi(3)+...+phi(-3)+phi(-4)+phi(-5) ,then the value of S is.a.5 b.11/2 c.6 d.13/2

If tan phi=(4)/(3), then the value of tan3 phi, is

If tan((pi)/(4)+phi)=(1)/(3) ,then the value of cos2 phi is

If phi(x)=phi'(x) and phi(1)=2, then phi(3) equals

If phi (x)=phi '(x) and phi(1)=2 , then phi(3) equals

If phi(x)=int(phi(x))^(-2)dx and phi(1)=0 then phi(x) is

If phi(x)=2^(mx+1) , show that phi(a). phi(b).phi(c)=4.phi(a+b+c).

(3 cos phi+cos 3 phi)/(3 sin phi-sin 3 phi)=

If phi(x)=(1-x)/(1+x) prove that phi{phi(x)}=x