If latus rectum of ellipse `x^2tan^2phi+y^2sec^2phi=1` is 1/2, then the value of `phi` where `phi in (0,pi)` is

If latus rectum of ellipse x^(2)tan^(2)phi+y^(2)sec^(2)phi=1 is 1/2, then the value of phi where phi in(0,pi) is

If latus rectum of ellipse x^2 tan^2 phi + y^2 sec^2 phi = 1 is 1/2 , then (0ltphi ltpi) is equal to (A) pi/2 (B) pi/6 (C) pi/3 (D) pi/12

tan^2phi-sec^2phi = ………………

If 2sec 2theta=tan phi+cotphi , then one of the values of theta+phi is

If 2sec 2theta=tan phi+cotphi , then one of the values of theta+phi is

If 2sec 2theta=tan phi+cotphi , then one of the values of theta+phi is

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

If 2sec2theta = tan phi + cot phi , then one of the values of theta + phi is: