Simplify :
`( ((tan A)( 1 - tan A ))/ ( tanA -1) )^2`

What is the simplified value of (tanA)/(1-cotA)+(cotA)/(1-tanA)-(2)/(sin2A) ?

Prove that : tan^(-1) 1 + tan^(-1) 2 + tan^(-1) 3= pi = 2(tan^(-1) 1 + tan^(-1)((1)/(2)) + tan^(-1)( (1)/(3)))

(6) 1+tanA tan2A = sec2A

Simplify tan^(-1)(cos x/(1+sin x))

If : (tan 3 A+tan A)/(tan 3A - tanA)=(sin(mA)/(sin(nA))) then (m,n)= (a) (2,3) (b)(3,4) (c)(4,2) (d) (1,2)

If (A)/(2) and A are not an odd multiple of (pi)/(2) then tan A= (2tan A)/(1-tan^(2)A) (2tan A)/(1+tan^(2)A) (2tan (A/2))/(1-tan^(2)(A/2))

Prove that: (tan(pi/4+A))/(tan(pi/4-A))=((1+tanA)/(1-tanA))^(2)

Simplify tan^(-1)((sinx)/(1+cos x))