If `a sec a-c tan a=d and b seca +dtan a =c` then

If a sec theta-c tan theta=d and b sec theta+d tan theta=c ,then prove that (c^(2)+d^(2))^(2)-(ac-bd)^(2)=(ad+bc)^(2)

If a sec alpha-c tan alpha=d and b sec alpha + d tan alpha=c , then eliminate alpha from above equations.

If a sec alpha-c tan alpha=d and b sec alpha + d tan alpha=c , then eliminate alpha from above equations.

If a sec alpha-c tan alpha=d and b sec alpha - d tan alpha=c , then eliminate alpha from above equations.

If a sec alpha +btan alpha=d and bsec alpha +a tan alpha=c prove that a^2+c^2=b^2+d^2

Eliminate theta from the equations a sec theta - c tan theta = b and b sec theta + d tan theta = c.

IF ( sec A - tan A) ( sec B - tan B) ( sec C- tan C ) =(sec A + tan A ) ( sec B + tan B ) ( secC + tan C ) then each is equal to

If sec A tan B + sec B tan A = 91 then the value of (secA secB + tanA tan B)^(2) - 91^(2) is equal to