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

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

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

Taking A=30^(@) , verify the following: tan2A=(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)

If A=30^(@) , then prove that : sin2A=2sinAcosA=(2tanA)/(1+tan^(2)A)

If A=30^(@) , then prove that : sin2A=2sinAcosA=(2tanA)/(1+tan^(2)A)

Show that tan(45^@+-A)=(1+-tanA)/(1bar+ tanA)

If A+B=45^(@) , show that (1+tanA)(1+tan B)=2 .

(2tan30^(@))/(1-tan^(2)30^(@))

prove that ((1-tanA)/(1-cotA))^2=tan^2A