If `(sec^4theta)/a+(tan^4theta)/b=1/(a+b),` then prove that `|b|lt=|a|` .

If sec theta + tan theta = 4 , then sec theta- tan theta =?

Prove : (sec theta-1)/(tan theta)=(tan theta)/(sec theta+1)

If sec theta + tan theta=(4)/(3) , then sec theta tan theta =_______

If sqrt(a + b) tan = theta/2 = sqrt(a -b) tan phi/2 then prove that a + b cos phi = (a cos phi+ b) sec theta .

Prove that : sec^(4)theta-tan^(4)theta=1+2tan^(2)theta

If x=a sec theta+b tan theta and y=a tan theta+b sec theta, prove that: x^(2)-y^(2)=a^(2)-b^(2)

Prove that (sec4 theta-1)/(sec2 theta-1)=(tan4 theta)/(tan theta)

If x=a sec theta+b tan theta and y=a tan theta+b sec theta then prove that x^(2)-y^(2)=a^(2)-b^(2)

prove :(sec8 theta-1)/(sec4 theta-1)=(tan8 theta)/(tan2 theta)

If a sec theta+b tan theta=c then (a tan theta+b sec theta)^(2)=