`sinA=(2tanA/2)/(1+tan^2A/2)`

Prove that sin2A=(2tanA)/(1+tan^2 A)

If A=30^(@) , verify that (i) sin2A=(2tanA)/(1+tan^(2)A) (ii) cos2A=(1-tan^(2)A)/(1+tan^(2)A) (iii) tan2A=(2tanA)/(1-tan^(2)A)

Prove that tan2A =(2tanA)/(1-tan^2 A)

If A =30^(@) ,then show that : tan2A=(2tanA)/(1-tan^(2)A)

If A =30^(@) ,then show that : tan2A=(2tanA)/(1-tan^(2)A)

Using the formula, tan 2A = (2tanA)/(1-tan^2A) , find the value of tan 60^@ , it being given that tan 30^@ =1/sqrt3

If A= 30^@ verify that :- sinA=tanA/ sqrt(1+tan^2A) .

Prove that (1+tan(A/2))/(1-tan(A/2))=secA+tanA

In a right triangle ABC , right angled at B , the ratio of A BtoA C is 1:sqrt(2) . Find the values of (2tanA)/(1+tan^2A) and (ii) (2tanA)/(1-tan^2A)

If tan A = sqrt2-1 show that (tanA)/(1+tan^2A)=(sqrt2)/4 = sinA cos A .