Solve :

`Sec^2( 40^( @ ) ) - Tan^2( 40^(@) )`

Value of tan ^(6) 40^(@) -33 tan ^(4) 40^(@)+ 27 tan ^(2) 40^(@) is "_________"

(5cos ^ (2) 60 ^ (@) + 4sec ^ (2) 30 ^ (@) - tan ^ (2) 40 ^ (@)) / (sin ^ (2) 30 ^ (@) + cos ^ ( 2) 30 ^ (@))

tan 70^(@) - tan 20^(@) -2 tan 40^(@)=

Prove that tan 40^(@) + 2 tan 10^(@) = tan 50^(@)

Solve: 6x^(2)+40=31x.

tan20^(@)tan40^(@)tan80^(@)

(cot50^(@))/(tan40^(@))

Prove that tan40^(@) + 2tan10^(@) = tan50^(@)

Solve (sin40^(@))/(cos50^(@))+(csc40^(@))/(sec50^(@))