" 20"quad " If "cos^(2)x+cos^(4)x=1" then "tan^(2)x+tan^(4)x=

If cos^(2)x+cos^(4)x=1 then tan^(2)x+tan^(4)x=1)12)03)-14)2

If cos^(2)x+cos^(4)x=1 , then find the value of tan^(2)x+tan^(4)x .

Prove that : 2sec^(2)x-sec^(4)x-2cos ec^(2)x+cos ec^(4)x=(1-tan^(8)x)/(tan^(4)x)

Show that cos 2 x=cos ^(2) x-sin ^(2) x=2 cos ^(2) x-1=1-2 sin ^(2) x=(1-tan ^(2) x)/(1+tan ^(2) x)

tan 4x = (4 tan x (1- tan ^(2) x ))/( 1 - 6 tan ^(2) x + tan ^(4) x)

tan 4x = (4 tan x (1- tan ^(2) x ))/( 1 - 6 tan ^(2) x + tan ^(4) x)

Prove: (sin x + cos x) / (cos ^ (3) x) = tan ^ (3) x + tan ^ (2) x + tan x + 1

Find sin 2x + cos 4x if tan 2x. Tan 4x = 1

If log_(tan x) (2 + 4 cos^(2) x) = 2 then x =

If exp { (tan^(2) x -tan^(4) x + tan^(8) x - tan^(6) x …. ) log_(e) 16 } , 0 lt x lt pi // 4 , satisfies the quadratic equation x^(2) - 3x + 2 = 0 , then value of cos^(2) x + cos^(4) x is