(sec alpha.sec beta+tan alpha.tan beta)^(2)-(sec alpha.tan beta+tan alpha.sec beta)^(2)=

(tan alpha + tan beta )/( tan (alpha + beta ))+(tan alpha - tan beta )/(tan (alpha - beta )) =

tan^(If)alpha+2tan alpha*tan2 beta=tan^(2)beta+2tan beta*tan2 alpha

Prove the following identity: (1+tan alpha tan beta)^(2)+(tan alpha)(tan alpha-tan beta)^(2)=sec^(2)alpha sec^(2)beta

If 2tan alpha=3tan beta then tan(alpha-beta)=

If x sec alpha+y tan alpha=x sec beta+y tan beta=a , then sec alpha*sec beta=

If (sec alpha+tan alpha)(sec beta+tan beta)(sec gamma+tan gamma)=tan alpha tan beta tan gamma, then (sec alpha-tan alpha)(sec beta-tan beta)(sec gamma-tan gamma)=

( tan alpha + " cosec " beta )^(2) - ( cot beta - sec alpha )^(2) =

If tan alpha=(1-cos beta)/(sin beta), then a )tan3 alpha=tan2 beta(b)tan2 alpha=tan beta(c)tan2 beta=tan alpha(d) none of these

If (sec alpha-tan alpha)(sec beta-tan beta)(sec gamma-tan gamma) = (sec alpha+tan alpha)(sec beta+tan beta)(sec gamma+ tan gamma) then show that each side is equal to 1 or -1.