If A + B is `90^@`, then ` ( tan A. tan B + tan A. cot B)/ (Sin A. Sec B) - sin^2 B/ cos^2 A` is equal to:

It A + B = 90^@ , then (tan A tan B + tan A cot B)/(sin A sec B) - (sin^2 B)/(cos^2 A) is equal to____

If A + B = 90^(@) , prove that sqrt((tan A tan B + tan A cot B)/(sin A sec B ) - (sin^(2) B)/(cos^(2)A)) = tan A .

(tan A + tan B) / (tan A-tan B) = (sin (A + B)) / (sin (AB))

If A+B=90 then prove that sqrt((tan A tan B+tan A cot B)/(sin A sec B))=sec A

If A+B=90^(0), prove that sqrt((tan A tan B+tan A cot B)/(sin A sec B)-(sin^(2)B)/(cos^(2)A))=tan A

If A+B=90^(@); prove that sqrt((tan A tan B+tan A cot B)/(sin A sec B)-(sin^(2)B)/(cos^(2)A))=tan A

if a+b=90^(@) then prove that sqrt((tan A tan B+tan A cot B)/(sin A sec B))=sec A